random lockups when using Firefox

[Tom Horsley]

On Sun, 03 Jan 2010 13:40:32 -0500
Julian C. Dunn wrote:

> >> Could there be some bug with the radeon driver that is causing this?  
> > 
> > Do you have desktop effects enabled?  
> 
> Nope, I don't.

There are certainly radeon bugs out there. For instance:

https://bugzilla.redhat.com/show_bug.cgi?id=541387

You might want to check yout /var/log/Xorg.0.log.old
file from the crash to see if there is a similar
backtrace in there to the on in the above bugzilla.