good point! It totally forgot about that!
But I just checked and no errors are shown.
But it also shows, that only the header is loaded and no body:
<html><head><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/langs/en.js?s=1371395454" onload="tinymce.dom.ScriptLoader._onLoad(this,'https://www.wikisquare.de/mail/program/js/tiny_mce/langs/en.js',0);"></script><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/themes/advanced/editor_template.js?s=1371395454" onload="tinymce.dom.ScriptLoader._onLoad(this,'https://www.wikisquare.de/mail/program/js/tiny_mce/themes/advanced/editor_template.js',1);"></script><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/themes/advanced/langs/en.js?s=1371395454"></script><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/paste/editor_plugin.js?s=1371395454" onload="tinymce.dom.ScriptLoader._onLoad(this,'https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/paste/editor_plugin.js',2);"></script><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/emotions/editor_plugin.js?s=1371395454" onload="tinymce.dom.ScriptLoader._onLoad(this,'https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/emotions/editor_plugin.js',3);"></script><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/media/editor_plugin.js?s=1371395454" onload="tinymce.dom.ScriptLoader._onLoad(this,'https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/media/editor_plugin.js',4);"></script><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/nonbreaking/editor_plugin.js?s=1371395454" onload="tinymce.dom.ScriptLoader._onLoad(this,'https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/nonbreaking/editor_plugin.js',5);"></script><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/table/editor_plugin.js?s=1371395454" onload="tinymce.dom.ScriptLoader._onLoad(this,'https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/table/editor_plugin.js',6);"></script><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/searchreplace/editor_plugin.js?s=1371395454" onload="tinymce.dom.ScriptLoader._onLoad(this,'https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/searchreplace/editor_plugin.js',7);"></script><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/visualchars/editor_plugin.js?s=1371395454" onload="tinymce.dom.ScriptLoader._onLoad(this,'https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/visualchars/editor_plugin.js',8);"></script><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/directionality/editor_plugin.js?s=1371395454" onload="tinymce.dom.ScriptLoader._onLoad(this,'https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/directionality/editor_plugin.js',9);"></script><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/inlinepopups/editor_plugin.js?s=1371395454" onload="tinymce.dom.ScriptLoader._onLoad(this,'https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/inlinepopups/editor_plugin.js',10);"></script><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/tabfocus/editor_plugin.js?s=1371395454" onload="tinymce.dom.ScriptLoader._onLoad(this,'https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/tabfocus/editor_plugin.js',11);"></script><script type="text/javascript" src="https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/spellchecker/editor_plugin.js?s=1371395454" onload="tinymce.dom.ScriptLoader._onLoad(this,'https://www.wikisquare.de/mail/program/js/tiny_mce/plugins/spellchecker/editor_plugin.js',12);"></script></head></html>