[eluser]Jeroen Brussich[/eluser]
[quote author="markusr" date="1296274152"]I've been using 2.0 for quite sometime, but for some reason when installed the official version my site broke

I'm thinking the problem must be my .htaccess file, because "url/signup" doesn't work but "url/index.php/signup" does. Even though ive removed index.php from my $config['index_page'] from my config file. Does anyone have any tips or an official 2.0 .htaccess file??[/quote]
I had the same problem and just added this to my .htaccess (right on top).
Code:
DirectoryIndex index.php index.html
Although this is no explanation why suddenly index.php is required in the uri, it gets the job done.
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Jeroen