Firefox 4.0.1 crashes with: nsHtml5TreeBuilder::pop()

Hello,
Since a few minutes I can't use firefox anymore, every time I try to open a page, I get a crash report. Even in safe mode.
The only page I seem to be able to visit is about:home, after that it crashes.
Could it be something with the 4.0.1 that I installed yesterday?
Hope somebody knows,
killerog.

Could you try temporarily disabling the HTML5 parser?
From your home page:
(1) Type or paste '''about:config''' in the address bar and press Enter. Click the button promising to be careful.
(2) In the filter box, type or paste '''html5''' and pause while the list is filtered
(3) Double-click '''html5.parser.enable''' to toggle it to false.
If you try to browse normally, does this head off the crash?

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