I'm using alfresco-community-3.4.d-installer-linux-x32 and if I use Firefox 5.0 doesn't render properly. It unsettles everything, sometimes instead of going to such a "My Space" it hangs. With Google Chrome that problem doesn't exist. Any Idea?
Can you be somewhat more specific please? As far as I can see Firefox 5.0 works well on Windows and OS X - maybe a Linux problem..? But without more detailed information, it's impossible to work out what that might be.
That looks like the CSS isn't being loaded. Try disabling all extensions, clearing the cache, etc. As I mentioned I've seen no problems with Firefox 5 locally and I'm sure we'd have had lots of bug reports in by now.