– Markup in "crash" and in "normal" doesn’t differ
– It’s not related to Firefox extensions since I could also reproduce it in Firefox’ secure mode without extensions
– It’s not related to the "tabs" feature since it has already be seen with the regular "list"
– it’s not really related to the browser cache since I was able to see it with and without cache
– it’s not related to the wrong XML prolog position in TYPO3 4.2

解决方法：

typo3conf\ext\templavoila\mod1\db_new_content_el.php
Index: mod1/db_new_content_el.php
===================================================================
— mod1/db_new_content_el.php    (revision 30848)
+++ mod1/db_new_content_el.php    (working copy)
@@ -128,6 +128,15 @@
         $this->doc->docType= ‘xhtml_trans’;
         $this->doc->backPath = $BACK_PATH;
         $this->doc->JScode=”;
+
+        if (t3lib_div::compat_version(‘4.3’)) {
+            $pageRenderer = $this->doc->getPageRenderer()->loadPrototype();
+        } elseif (t3lib_div::compat_version(‘4.1’)) {
+            $this->doc->loadJavascriptLib(‘contrib/prototype/prototype.js’);
+        } else {
+            $this->doc->JScodeArray[‘prototypeJS’] = ‘<script type="text/javascript" src="’ . $this->doc->backPath . ‘contrib/prototype/prototype.js"></script>’;
+        }
+
         $this->doc->JScodeLibArray[‘dyntabmenu’] = $this->doc->getDynTabMenuJScode();
         $this->doc->form='<form action="" name="editForm">’;
 
@@ -204,21 +213,23 @@
                 $this->elementWrapper = $this->elementWrapperForTabs;
             }
 
–            // add document inline javascript
+                // add document inline javascript
             $this->doc->JScode = $this->doc->wrapScriptTags(‘
                 function goToalt_doc()    {    //
                     ‘ . $this->onClickEvent . ‘
                 }
 
–                if(top.refreshMenu) {
–                    top.refreshMenu();
–                } else {
–                    top.TYPO3ModuleMenu.refreshMenu();
–                }
+                Event.observe(window, \’load\’, function() {
+                    if(top.refreshMenu) {
+                        top.refreshMenu();
+                    } else {
+                        top.TYPO3ModuleMenu.refreshMenu();
+                    }
 
–                if(top.shortcutFrame) {
–                    top.shortcutFrame.refreshShortcuts();
–                }
+                    if(top.shortcutFrame) {
+                        top.shortcutFrame.refreshShortcuts();
+                    }
+                });
             ‘);
 
                 // Traverse items for the wizard.