Admin Main Content hidden Installing Craft 2.2 succeeded. But every main content in the admin is hidden. Example Dashboard (copy &amp; paste from ff debug, which shows only containers without sub nodes!):

&lt;main id="main" role="main"&gt;
    &lt;div class="grid" style=""&gt;
    &lt;div class="resize-triggers"&gt;
    &lt;div class="item first" data-colspan="1"&gt; &lt;---- display: none
    &lt;div class="item" data-colspan="1"&gt; &lt;---- display: none
    &lt;div class="item" data-colspan="1"&gt; &lt;---- display: none
    &lt;div class="item" data-colspan="1"&gt; &lt;---- display: none
    &lt;div class="item" data-colspan="1"&gt; &lt;---- display: none
&lt;/main&gt;


When display: none is disabled in FireDebug I see evreything how it should.

What is wrong?
Seems to be a browser bug. Dashboard is not working with Firefox 20. With Firefox 31 admin is working.