diff --git a/bower.json b/bower.json
index e217e3e..12b575f 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "aurelia-animator-css",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "An implementation of the abstract Animator interface from templating which enables css-based animations.",
   "keywords": [
     "aurelia",
diff --git a/dist/amd/aurelia-animator-css.js b/dist/amd/aurelia-animator-css.js
index 1fe1fff..2875987 100644
--- a/dist/amd/aurelia-animator-css.js
+++ b/dist/amd/aurelia-animator-css.js
@@ -28,6 +28,13 @@ define(['exports', 'aurelia-templating', 'aurelia-pal'], function (exports, _aur
       }
     };
 
+    CssAnimator.prototype._removeMultipleEventListener = function _removeMultipleEventListener(el, s, fn) {
+      var evts = s.split(' ');
+      for (var i = 0, ii = evts.length; i < ii; ++i) {
+        el.removeEventListener(evts[i], fn, false);
+      }
+    };
+
     CssAnimator.prototype._getElementAnimationDelay = function _getElementAnimationDelay(element) {
       var styl = _aureliaPal.DOM.getComputedStyle(element);
       var prop = void 0;
@@ -111,7 +118,11 @@ define(['exports', 'aurelia-templating', 'aurelia-pal'], function (exports, _aur
 
       try {
         for (var i = 0; i < styleSheets.length; ++i) {
-          var cssRules = styleSheets[i].cssRules;
+          var cssRules = null;
+
+          try {
+            cssRules = styleSheets[i].cssRules;
+          } catch (e) {}
 
           if (!cssRules) {
             continue;
@@ -218,6 +229,10 @@ define(['exports', 'aurelia-templating', 'aurelia-pal'], function (exports, _aur
           if (!_this4._animationChangeWithValidKeyframe(animationNames, prevAnimationNames)) {
             classList.remove('au-enter-active');
             classList.remove('au-enter');
+
+            _this4._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd);
+            _this4._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart);
+
             _this4._triggerDOMEvent(_aureliaTemplating.animationEvent.enterTimeout, element);
             resolve(false);
           }
@@ -300,6 +315,10 @@ define(['exports', 'aurelia-templating', 'aurelia-pal'], function (exports, _aur
           if (!_this5._animationChangeWithValidKeyframe(animationNames, prevAnimationNames)) {
             classList.remove('au-leave-active');
             classList.remove('au-leave');
+
+            _this5._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd2);
+            _this5._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart2);
+
             _this5._triggerDOMEvent(_aureliaTemplating.animationEvent.leaveTimeout, element);
             resolve(false);
           }
@@ -385,6 +404,9 @@ define(['exports', 'aurelia-templating', 'aurelia-pal'], function (exports, _aur
           classList.remove(className + '-remove');
           classList.remove(className);
 
+          _this6._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd3);
+          _this6._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart3);
+
           if (suppressEvents !== true) {
             _this6._triggerDOMEvent(_aureliaTemplating.animationEvent.removeClassTimeout, element);
           }
@@ -453,6 +475,9 @@ define(['exports', 'aurelia-templating', 'aurelia-pal'], function (exports, _aur
           classList.remove(className + '-add');
           classList.add(className);
 
+          _this7._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd4);
+          _this7._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart4);
+
           if (suppressEvents !== true) {
             _this7._triggerDOMEvent(_aureliaTemplating.animationEvent.addClassTimeout, element);
           }
diff --git a/dist/aurelia-animator-css.js b/dist/aurelia-animator-css.js
index 76fcd0c..d8f0419 100644
--- a/dist/aurelia-animator-css.js
+++ b/dist/aurelia-animator-css.js
@@ -37,6 +37,20 @@ export class CssAnimator {
     }
   }
 
+  /**
+   * Remove multiple listeners at once from the given element
+   *
+   * @param el the element
+   * @param s  collection of events to remove
+   * @param fn callback to remove
+   */
+  _removeMultipleEventListener(el: HTMLElement, s: string, fn: Function) : void {
+    let evts = s.split(' ');
+    for (let i = 0, ii = evts.length; i < ii; ++i) {
+      el.removeEventListener(evts[i], fn, false);
+    }
+  }
+
   /**
    * Vendor-prefix save method to get the animation-delay
    *
@@ -153,7 +167,13 @@ export class CssAnimator {
 
     try {
       for (let i = 0; i < styleSheets.length; ++i) {
-        let cssRules = styleSheets[i].cssRules;
+        let cssRules = null;
+
+        try {
+          cssRules = styleSheets[i].cssRules;
+        } catch (e) {
+          // do nothing
+        }
 
         if (!cssRules) {
           continue;
@@ -285,6 +305,10 @@ export class CssAnimator {
         if (! this._animationChangeWithValidKeyframe(animationNames, prevAnimationNames)) {
           classList.remove('au-enter-active');
           classList.remove('au-enter');
+
+          this._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', animEnd);
+          this._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', animStart);
+
           this._triggerDOMEvent(animationEvent.enterTimeout, element);
           resolve(false);
         }
@@ -389,6 +413,10 @@ export class CssAnimator {
         if (! this._animationChangeWithValidKeyframe(animationNames, prevAnimationNames)) {
           classList.remove('au-leave-active');
           classList.remove('au-leave');
+
+          this._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', animEnd);
+          this._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', animStart);
+
           this._triggerDOMEvent(animationEvent.leaveTimeout, element);
           resolve(false);
         }
@@ -492,6 +520,9 @@ export class CssAnimator {
         classList.remove(className + '-remove');
         classList.remove(className);
 
+        this._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', animEnd);
+        this._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', animStart);
+
         if (suppressEvents !== true) {
           this._triggerDOMEvent(animationEvent.removeClassTimeout, element);
         }
@@ -572,6 +603,9 @@ export class CssAnimator {
         classList.remove(className + '-add');
         classList.add(className);
 
+        this._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', animEnd);
+        this._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', animStart);
+
         if (suppressEvents !== true) {
           this._triggerDOMEvent(animationEvent.addClassTimeout, element);
         }
diff --git a/dist/commonjs/aurelia-animator-css.js b/dist/commonjs/aurelia-animator-css.js
index c26533d..72d5cfd 100644
--- a/dist/commonjs/aurelia-animator-css.js
+++ b/dist/commonjs/aurelia-animator-css.js
@@ -31,6 +31,13 @@ var CssAnimator = exports.CssAnimator = function () {
     }
   };
 
+  CssAnimator.prototype._removeMultipleEventListener = function _removeMultipleEventListener(el, s, fn) {
+    var evts = s.split(' ');
+    for (var i = 0, ii = evts.length; i < ii; ++i) {
+      el.removeEventListener(evts[i], fn, false);
+    }
+  };
+
   CssAnimator.prototype._getElementAnimationDelay = function _getElementAnimationDelay(element) {
     var styl = _aureliaPal.DOM.getComputedStyle(element);
     var prop = void 0;
@@ -114,7 +121,11 @@ var CssAnimator = exports.CssAnimator = function () {
 
     try {
       for (var i = 0; i < styleSheets.length; ++i) {
-        var cssRules = styleSheets[i].cssRules;
+        var cssRules = null;
+
+        try {
+          cssRules = styleSheets[i].cssRules;
+        } catch (e) {}
 
         if (!cssRules) {
           continue;
@@ -221,6 +232,10 @@ var CssAnimator = exports.CssAnimator = function () {
         if (!_this4._animationChangeWithValidKeyframe(animationNames, prevAnimationNames)) {
           classList.remove('au-enter-active');
           classList.remove('au-enter');
+
+          _this4._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd);
+          _this4._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart);
+
           _this4._triggerDOMEvent(_aureliaTemplating.animationEvent.enterTimeout, element);
           resolve(false);
         }
@@ -303,6 +318,10 @@ var CssAnimator = exports.CssAnimator = function () {
         if (!_this5._animationChangeWithValidKeyframe(animationNames, prevAnimationNames)) {
           classList.remove('au-leave-active');
           classList.remove('au-leave');
+
+          _this5._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd2);
+          _this5._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart2);
+
           _this5._triggerDOMEvent(_aureliaTemplating.animationEvent.leaveTimeout, element);
           resolve(false);
         }
@@ -388,6 +407,9 @@ var CssAnimator = exports.CssAnimator = function () {
         classList.remove(className + '-remove');
         classList.remove(className);
 
+        _this6._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd3);
+        _this6._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart3);
+
         if (suppressEvents !== true) {
           _this6._triggerDOMEvent(_aureliaTemplating.animationEvent.removeClassTimeout, element);
         }
@@ -456,6 +478,9 @@ var CssAnimator = exports.CssAnimator = function () {
         classList.remove(className + '-add');
         classList.add(className);
 
+        _this7._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd4);
+        _this7._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart4);
+
         if (suppressEvents !== true) {
           _this7._triggerDOMEvent(_aureliaTemplating.animationEvent.addClassTimeout, element);
         }
diff --git a/dist/es2015/aurelia-animator-css.js b/dist/es2015/aurelia-animator-css.js
index f16aa2b..b051fe5 100644
--- a/dist/es2015/aurelia-animator-css.js
+++ b/dist/es2015/aurelia-animator-css.js
@@ -18,6 +18,13 @@ export let CssAnimator = class CssAnimator {
     }
   }
 
+  _removeMultipleEventListener(el, s, fn) {
+    let evts = s.split(' ');
+    for (let i = 0, ii = evts.length; i < ii; ++i) {
+      el.removeEventListener(evts[i], fn, false);
+    }
+  }
+
   _getElementAnimationDelay(element) {
     let styl = DOM.getComputedStyle(element);
     let prop;
@@ -97,7 +104,11 @@ export let CssAnimator = class CssAnimator {
 
     try {
       for (let i = 0; i < styleSheets.length; ++i) {
-        let cssRules = styleSheets[i].cssRules;
+        let cssRules = null;
+
+        try {
+          cssRules = styleSheets[i].cssRules;
+        } catch (e) {}
 
         if (!cssRules) {
           continue;
@@ -198,6 +209,10 @@ export let CssAnimator = class CssAnimator {
         if (!this._animationChangeWithValidKeyframe(animationNames, prevAnimationNames)) {
           classList.remove('au-enter-active');
           classList.remove('au-enter');
+
+          this._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', animEnd);
+          this._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', animStart);
+
           this._triggerDOMEvent(animationEvent.enterTimeout, element);
           resolve(false);
         }
@@ -278,6 +293,10 @@ export let CssAnimator = class CssAnimator {
         if (!this._animationChangeWithValidKeyframe(animationNames, prevAnimationNames)) {
           classList.remove('au-leave-active');
           classList.remove('au-leave');
+
+          this._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', animEnd);
+          this._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', animStart);
+
           this._triggerDOMEvent(animationEvent.leaveTimeout, element);
           resolve(false);
         }
@@ -359,6 +378,9 @@ export let CssAnimator = class CssAnimator {
         classList.remove(className + '-remove');
         classList.remove(className);
 
+        this._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', animEnd);
+        this._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', animStart);
+
         if (suppressEvents !== true) {
           this._triggerDOMEvent(animationEvent.removeClassTimeout, element);
         }
@@ -423,6 +445,9 @@ export let CssAnimator = class CssAnimator {
         classList.remove(className + '-add');
         classList.add(className);
 
+        this._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', animEnd);
+        this._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', animStart);
+
         if (suppressEvents !== true) {
           this._triggerDOMEvent(animationEvent.addClassTimeout, element);
         }
diff --git a/dist/native-modules/aurelia-animator-css.js b/dist/native-modules/aurelia-animator-css.js
index 0dc49c2..90cddd8 100644
--- a/dist/native-modules/aurelia-animator-css.js
+++ b/dist/native-modules/aurelia-animator-css.js
@@ -22,6 +22,13 @@ export var CssAnimator = function () {
     }
   };
 
+  CssAnimator.prototype._removeMultipleEventListener = function _removeMultipleEventListener(el, s, fn) {
+    var evts = s.split(' ');
+    for (var i = 0, ii = evts.length; i < ii; ++i) {
+      el.removeEventListener(evts[i], fn, false);
+    }
+  };
+
   CssAnimator.prototype._getElementAnimationDelay = function _getElementAnimationDelay(element) {
     var styl = DOM.getComputedStyle(element);
     var prop = void 0;
@@ -105,7 +112,11 @@ export var CssAnimator = function () {
 
     try {
       for (var i = 0; i < styleSheets.length; ++i) {
-        var cssRules = styleSheets[i].cssRules;
+        var cssRules = null;
+
+        try {
+          cssRules = styleSheets[i].cssRules;
+        } catch (e) {}
 
         if (!cssRules) {
           continue;
@@ -212,6 +223,10 @@ export var CssAnimator = function () {
         if (!_this4._animationChangeWithValidKeyframe(animationNames, prevAnimationNames)) {
           classList.remove('au-enter-active');
           classList.remove('au-enter');
+
+          _this4._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd);
+          _this4._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart);
+
           _this4._triggerDOMEvent(animationEvent.enterTimeout, element);
           resolve(false);
         }
@@ -294,6 +309,10 @@ export var CssAnimator = function () {
         if (!_this5._animationChangeWithValidKeyframe(animationNames, prevAnimationNames)) {
           classList.remove('au-leave-active');
           classList.remove('au-leave');
+
+          _this5._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd2);
+          _this5._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart2);
+
           _this5._triggerDOMEvent(animationEvent.leaveTimeout, element);
           resolve(false);
         }
@@ -379,6 +398,9 @@ export var CssAnimator = function () {
         classList.remove(className + '-remove');
         classList.remove(className);
 
+        _this6._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd3);
+        _this6._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart3);
+
         if (suppressEvents !== true) {
           _this6._triggerDOMEvent(animationEvent.removeClassTimeout, element);
         }
@@ -447,6 +469,9 @@ export var CssAnimator = function () {
         classList.remove(className + '-add');
         classList.add(className);
 
+        _this7._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd4);
+        _this7._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart4);
+
         if (suppressEvents !== true) {
           _this7._triggerDOMEvent(animationEvent.addClassTimeout, element);
         }
diff --git a/dist/system/aurelia-animator-css.js b/dist/system/aurelia-animator-css.js
index 0b7b291..2708774 100644
--- a/dist/system/aurelia-animator-css.js
+++ b/dist/system/aurelia-animator-css.js
@@ -44,6 +44,13 @@ System.register(['aurelia-templating', 'aurelia-pal'], function (_export, _conte
           }
         };
 
+        CssAnimator.prototype._removeMultipleEventListener = function _removeMultipleEventListener(el, s, fn) {
+          var evts = s.split(' ');
+          for (var i = 0, ii = evts.length; i < ii; ++i) {
+            el.removeEventListener(evts[i], fn, false);
+          }
+        };
+
         CssAnimator.prototype._getElementAnimationDelay = function _getElementAnimationDelay(element) {
           var styl = DOM.getComputedStyle(element);
           var prop = void 0;
@@ -127,7 +134,11 @@ System.register(['aurelia-templating', 'aurelia-pal'], function (_export, _conte
 
           try {
             for (var i = 0; i < styleSheets.length; ++i) {
-              var cssRules = styleSheets[i].cssRules;
+              var cssRules = null;
+
+              try {
+                cssRules = styleSheets[i].cssRules;
+              } catch (e) {}
 
               if (!cssRules) {
                 continue;
@@ -234,6 +245,10 @@ System.register(['aurelia-templating', 'aurelia-pal'], function (_export, _conte
               if (!_this4._animationChangeWithValidKeyframe(animationNames, prevAnimationNames)) {
                 classList.remove('au-enter-active');
                 classList.remove('au-enter');
+
+                _this4._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd);
+                _this4._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart);
+
                 _this4._triggerDOMEvent(animationEvent.enterTimeout, element);
                 resolve(false);
               }
@@ -316,6 +331,10 @@ System.register(['aurelia-templating', 'aurelia-pal'], function (_export, _conte
               if (!_this5._animationChangeWithValidKeyframe(animationNames, prevAnimationNames)) {
                 classList.remove('au-leave-active');
                 classList.remove('au-leave');
+
+                _this5._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd2);
+                _this5._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart2);
+
                 _this5._triggerDOMEvent(animationEvent.leaveTimeout, element);
                 resolve(false);
               }
@@ -401,6 +420,9 @@ System.register(['aurelia-templating', 'aurelia-pal'], function (_export, _conte
               classList.remove(className + '-remove');
               classList.remove(className);
 
+              _this6._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd3);
+              _this6._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart3);
+
               if (suppressEvents !== true) {
                 _this6._triggerDOMEvent(animationEvent.removeClassTimeout, element);
               }
@@ -469,6 +491,9 @@ System.register(['aurelia-templating', 'aurelia-pal'], function (_export, _conte
               classList.remove(className + '-add');
               classList.add(className);
 
+              _this7._removeMultipleEventListener(element, 'webkitAnimationEnd animationend', _animEnd4);
+              _this7._removeMultipleEventListener(element, 'webkitAnimationStart animationstart', _animStart4);
+
               if (suppressEvents !== true) {
                 _this7._triggerDOMEvent(animationEvent.addClassTimeout, element);
               }
diff --git a/doc/CHANGELOG.md b/doc/CHANGELOG.md
index 07b7bad..198982c 100644
--- a/doc/CHANGELOG.md
+++ b/doc/CHANGELOG.md
@@ -1,3 +1,14 @@
+<a name="1.0.1"></a>
+## [1.0.1](https://github.com/aurelia/animator-css/compare/1.0.0...v1.0.1) (2016-09-05)
+
+
+### Bug Fixes
+
+* **CssAnimator:** clear event handlers when there's no animation ([7683336](https://github.com/aurelia/animator-css/commit/7683336)), closes [#47](https://github.com/aurelia/animator-css/issues/47)
+* **cssRules:** add additional try/catch ([4e21ea8](https://github.com/aurelia/animator-css/commit/4e21ea8)), closes [#40](https://github.com/aurelia/animator-css/issues/40)
+
+
+
 <a name="1.0.0"></a>
 # [1.0.0](https://github.com/aurelia/animator-css/compare/1.0.0-rc.1.0.0...v1.0.0) (2016-07-27)
 
diff --git a/package.json b/package.json
index efbfd50..62fe7ba 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "aurelia-animator-css",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "An implementation of the abstract Animator interface from templating which enables css-based animations.",
   "keywords": [
     "aurelia",