Comment 13 for bug 333127

Kevin Brosnan gave us a workaround:

There is a workaround which is to create a script that does the following.
#!/bin/sh
export LD_PRELOAD=/usr/lib/libGL.so.1
/path/to/firefox

In the case of Firefox 3. package from PPA, the file /usr/lib/firefox-3.5pre/firefox.sh should be modified adding:

export LD_PRELOAD=/usr/lib/libGL.so.1

I modified it, and works!!!!

Additional to this, the problem seems to be from nVidia drivers, so, only people with nVidia cards have this problem . This already was reported:

http://www.nvnews.net/vbulletin/showthread.php?p=1997651