Re: *** glibc detected *** munmap_chunk(): invalid pointer: 0xb7f1a470 ***
I'm a Gentoo user, and I had just that problem when I tried using Firefox 3.0.x from Mozilla.org. From my tests, the problem disappeared when I tried libglx.so from nvidia-177.8x series, but that's not a solution. Also, the problem sometimes disappeared when cairo was compiled without glitz support. In my case the problems disappeared when I updated cairo from 1.6.x to 1.8.x and I installed Firefox 3.0.x from source.