diff --git a/src/Symfony/Bundle/TwigBundle/Resources/views/Exception/exception.html.twig b/src/Symfony/Bundle/TwigBundle/Resources/views/Exception/exception.html.twig
index 5b44b81215..a93d9c4325 100644
--- a/src/Symfony/Bundle/TwigBundle/Resources/views/Exception/exception.html.twig
+++ b/src/Symfony/Bundle/TwigBundle/Resources/views/Exception/exception.html.twig
@@ -47,8 +47,8 @@
             <h2>
                 Logs&nbsp;
                 <a href="#" onclick="toggle('logs'); switchIcons('icon-logs-open', 'icon-logs-close'); return false;">
-                    <img class="toggle" id="icon-logs-open" alt="+" src="data:image/gif;base64,R0lGODlhEgASAMQTANft99/v+Ga44bHb8ITG52S44dXs9+z1+uPx+YvK6WC24G+944/M6W28443L6dnu+Ge54v/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABMALAAAAAASABIAQAVS4DQBTiOd6LkwgJgeUSzHSDoNaZ4PU6FLgYBA5/vFID/DbylRGiNIZu74I0h1hNsVxbNuUV4d9SsZM2EzWe1qThVzwWFOAFCQFa1RQq6DJB4iIQA7" style="visibility: hidden" />
-                    <img class="toggle" id="icon-logs-close" alt="-" src="data:image/gif;base64,R0lGODlhEgASAMQSANft94TG57Hb8GS44ez1+mC24IvK6ePx+Wa44dXs92+942e54o3L6W2844/M6dnu+P/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABIALAAAAAASABIAQAVCoCQBTBOd6Kk4gJhGBCTPxysJb44K0qD/ER/wlxjmisZkMqBEBW5NHrMZmVKvv9hMVsO+hE0EoNAstEYGxG9heIhCADs=" style="visibility: visible; margin-left: -18px" />
+                    <img class="toggle" id="icon-logs-open" alt="+" src="data:image/gif;base64,R0lGODlhEgASAMQTANft99/v+Ga44bHb8ITG52S44dXs9+z1+uPx+YvK6WC24G+944/M6W28443L6dnu+Ge54v/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABMALAAAAAASABIAQAVS4DQBTiOd6LkwgJgeUSzHSDoNaZ4PU6FLgYBA5/vFID/DbylRGiNIZu74I0h1hNsVxbNuUV4d9SsZM2EzWe1qThVzwWFOAFCQFa1RQq6DJB4iIQA7" style="display: none" />
+                    <img class="toggle" id="icon-logs-close" alt="-" src="data:image/gif;base64,R0lGODlhEgASAMQSANft94TG57Hb8GS44ez1+mC24IvK6ePx+Wa44dXs92+942e54o3L6W2844/M6dnu+P/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABIALAAAAAASABIAQAVCoCQBTBOd6Kk4gJhGBCTPxysJb44K0qD/ER/wlxjmisZkMqBEBW5NHrMZmVKvv9hMVsO+hE0EoNAstEYGxG9heIhCADs=" style="display: inline" />
                 </a>
             </h2>
             {% endspaceless %}
@@ -74,8 +74,8 @@
         <h2>
             Content of the Output&nbsp;
             <a href="#" onclick="toggle('output-content'); switchIcons('icon-content-open', 'icon-content-close'); return false;">
-                <img class="toggle" id="icon-content-close" alt="-" src="data:image/gif;base64,R0lGODlhEgASAMQSANft94TG57Hb8GS44ez1+mC24IvK6ePx+Wa44dXs92+942e54o3L6W2844/M6dnu+P/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABIALAAAAAASABIAQAVCoCQBTBOd6Kk4gJhGBCTPxysJb44K0qD/ER/wlxjmisZkMqBEBW5NHrMZmVKvv9hMVsO+hE0EoNAstEYGxG9heIhCADs=" style="visibility: hidden" />
-                <img class="toggle" id="icon-content-open" alt="+" src="data:image/gif;base64,R0lGODlhEgASAMQTANft99/v+Ga44bHb8ITG52S44dXs9+z1+uPx+YvK6WC24G+944/M6W28443L6dnu+Ge54v/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABMALAAAAAASABIAQAVS4DQBTiOd6LkwgJgeUSzHSDoNaZ4PU6FLgYBA5/vFID/DbylRGiNIZu74I0h1hNsVxbNuUV4d9SsZM2EzWe1qThVzwWFOAFCQFa1RQq6DJB4iIQA7" style="visibility: visible; margin-left: -18px" />
+                <img class="toggle" id="icon-content-close" alt="-" src="data:image/gif;base64,R0lGODlhEgASAMQSANft94TG57Hb8GS44ez1+mC24IvK6ePx+Wa44dXs92+942e54o3L6W2844/M6dnu+P/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABIALAAAAAASABIAQAVCoCQBTBOd6Kk4gJhGBCTPxysJb44K0qD/ER/wlxjmisZkMqBEBW5NHrMZmVKvv9hMVsO+hE0EoNAstEYGxG9heIhCADs=" style="display: none" />
+                <img class="toggle" id="icon-content-open" alt="+" src="data:image/gif;base64,R0lGODlhEgASAMQTANft99/v+Ga44bHb8ITG52S44dXs9+z1+uPx+YvK6WC24G+944/M6W28443L6dnu+Ge54v/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABMALAAAAAASABIAQAVS4DQBTiOd6LkwgJgeUSzHSDoNaZ4PU6FLgYBA5/vFID/DbylRGiNIZu74I0h1hNsVxbNuUV4d9SsZM2EzWe1qThVzwWFOAFCQFa1RQq6DJB4iIQA7" style="display: inline" />
             </a>
         </h2>
         {% endspaceless %}
@@ -107,15 +107,15 @@
     }
 
     function switchIcons(id1, id2) {
-        var icon1, icon2, visibility1, visibility2;
+        var icon1, icon2, display1, display2;
 
         icon1 = document.getElementById(id1);
         icon2 = document.getElementById(id2);
 
-        visibility1 = icon1.style.visibility;
-        visibility2 = icon2.style.visibility;
+        display1 = icon1.style.display;
+        display2 = icon2.style.display;
 
-        icon1.style.visibility = visibility2;
-        icon2.style.visibility = visibility1;
+        icon1.style.display = display2;
+        icon2.style.display = display1;
     }
 //]]></script>
diff --git a/src/Symfony/Bundle/TwigBundle/Resources/views/Exception/trace.html.twig b/src/Symfony/Bundle/TwigBundle/Resources/views/Exception/trace.html.twig
index d4a11e1e50..d00a376a45 100644
--- a/src/Symfony/Bundle/TwigBundle/Resources/views/Exception/trace.html.twig
+++ b/src/Symfony/Bundle/TwigBundle/Resources/views/Exception/trace.html.twig
@@ -12,8 +12,8 @@
     in {{ trace.file|format_file(trace.line) }}&nbsp;
     {% spaceless %}
     <a href="#" onclick="toggle('trace-{{ prefix ~ '-' ~ i }}'); switchIcons('icon-{{ prefix ~ '-' ~ i }}-open', 'icon-{{ prefix ~ '-' ~ i }}-close'); return false;">
-        <img class="toggle" id="icon-{{ prefix ~ '-' ~ i }}-close" alt="-" src="data:image/gif;base64,R0lGODlhEgASAMQSANft94TG57Hb8GS44ez1+mC24IvK6ePx+Wa44dXs92+942e54o3L6W2844/M6dnu+P/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABIALAAAAAASABIAQAVCoCQBTBOd6Kk4gJhGBCTPxysJb44K0qD/ER/wlxjmisZkMqBEBW5NHrMZmVKvv9hMVsO+hE0EoNAstEYGxG9heIhCADs=" style="visibility: {{ 0 == i ? 'visible' : 'hidden' }}" />
-        <img class="toggle" id="icon-{{ prefix ~ '-' ~ i }}-open" alt="+" src="data:image/gif;base64,R0lGODlhEgASAMQTANft99/v+Ga44bHb8ITG52S44dXs9+z1+uPx+YvK6WC24G+944/M6W28443L6dnu+Ge54v/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABMALAAAAAASABIAQAVS4DQBTiOd6LkwgJgeUSzHSDoNaZ4PU6FLgYBA5/vFID/DbylRGiNIZu74I0h1hNsVxbNuUV4d9SsZM2EzWe1qThVzwWFOAFCQFa1RQq6DJB4iIQA7" style="visibility: {{ 0 == i ? 'hidden' : 'visible' }}; margin-left: -18px" />
+        <img class="toggle" id="icon-{{ prefix ~ '-' ~ i }}-close" alt="-" src="data:image/gif;base64,R0lGODlhEgASAMQSANft94TG57Hb8GS44ez1+mC24IvK6ePx+Wa44dXs92+942e54o3L6W2844/M6dnu+P/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABIALAAAAAASABIAQAVCoCQBTBOd6Kk4gJhGBCTPxysJb44K0qD/ER/wlxjmisZkMqBEBW5NHrMZmVKvv9hMVsO+hE0EoNAstEYGxG9heIhCADs=" style="display: {{ 0 == i ? 'inline' : 'none' }}" />
+        <img class="toggle" id="icon-{{ prefix ~ '-' ~ i }}-open" alt="+" src="data:image/gif;base64,R0lGODlhEgASAMQTANft99/v+Ga44bHb8ITG52S44dXs9+z1+uPx+YvK6WC24G+944/M6W28443L6dnu+Ge54v/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABMALAAAAAASABIAQAVS4DQBTiOd6LkwgJgeUSzHSDoNaZ4PU6FLgYBA5/vFID/DbylRGiNIZu74I0h1hNsVxbNuUV4d9SsZM2EzWe1qThVzwWFOAFCQFa1RQq6DJB4iIQA7" style="display: {{ 0 == i ? 'none' : 'inline' }}" />
     </a>
     {% endspaceless %}
     <div id="trace-{{ prefix ~ '-' ~ i }}" style="display: {{ 0 == i ? 'block' : 'none' }}" class="trace">
diff --git a/src/Symfony/Bundle/TwigBundle/Resources/views/Exception/traces.html.twig b/src/Symfony/Bundle/TwigBundle/Resources/views/Exception/traces.html.twig
index e0f1a0db13..cf49082cf4 100644
--- a/src/Symfony/Bundle/TwigBundle/Resources/views/Exception/traces.html.twig
+++ b/src/Symfony/Bundle/TwigBundle/Resources/views/Exception/traces.html.twig
@@ -5,8 +5,8 @@
             {{ exception.class|abbr_class }}: {{ exception.message|nl2br|format_file_from_text }}&nbsp;
             {% spaceless %}
             <a href="#" onclick="toggle('traces-{{ position }}', 'traces'); switchIcons('icon-traces-{{ position }}-open', 'icon-traces-{{ position }}-close'); return false;">
-                <img class="toggle" id="icon-traces-{{ position }}-close" alt="-" src="data:image/gif;base64,R0lGODlhEgASAMQSANft94TG57Hb8GS44ez1+mC24IvK6ePx+Wa44dXs92+942e54o3L6W2844/M6dnu+P/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABIALAAAAAASABIAQAVCoCQBTBOd6Kk4gJhGBCTPxysJb44K0qD/ER/wlxjmisZkMqBEBW5NHrMZmVKvv9hMVsO+hE0EoNAstEYGxG9heIhCADs=" style="visibility: {{ 0 == count ? 'visible' : 'hidden' }}" />
-                <img class="toggle" id="icon-traces-{{ position }}-open" alt="+" src="data:image/gif;base64,R0lGODlhEgASAMQTANft99/v+Ga44bHb8ITG52S44dXs9+z1+uPx+YvK6WC24G+944/M6W28443L6dnu+Ge54v/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABMALAAAAAASABIAQAVS4DQBTiOd6LkwgJgeUSzHSDoNaZ4PU6FLgYBA5/vFID/DbylRGiNIZu74I0h1hNsVxbNuUV4d9SsZM2EzWe1qThVzwWFOAFCQFa1RQq6DJB4iIQA7" style="visibility: {{ 0 == count ? 'hidden' : 'visible' }}; margin-left: -18px" />
+                <img class="toggle" id="icon-traces-{{ position }}-close" alt="-" src="data:image/gif;base64,R0lGODlhEgASAMQSANft94TG57Hb8GS44ez1+mC24IvK6ePx+Wa44dXs92+942e54o3L6W2844/M6dnu+P/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABIALAAAAAASABIAQAVCoCQBTBOd6Kk4gJhGBCTPxysJb44K0qD/ER/wlxjmisZkMqBEBW5NHrMZmVKvv9hMVsO+hE0EoNAstEYGxG9heIhCADs=" style="display: {{ 0 == count ? 'inline' : 'none' }}" />
+                <img class="toggle" id="icon-traces-{{ position }}-open" alt="+" src="data:image/gif;base64,R0lGODlhEgASAMQTANft99/v+Ga44bHb8ITG52S44dXs9+z1+uPx+YvK6WC24G+944/M6W28443L6dnu+Ge54v/+/l614P///wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABMALAAAAAASABIAQAVS4DQBTiOd6LkwgJgeUSzHSDoNaZ4PU6FLgYBA5/vFID/DbylRGiNIZu74I0h1hNsVxbNuUV4d9SsZM2EzWe1qThVzwWFOAFCQFa1RQq6DJB4iIQA7" style="display: {{ 0 == count ? 'none' : 'inline' }}" />
             </a>
             {% endspaceless %}
         </h2>