How stable are GCC 2.95.3, 3.0.4, and 3.1.0 compared to each other?
 

I was wondering how stable GCC 2.95.3, 3.0.4, and 3.1.0 were compared to each other. I'm currently using 2.95.3, but it doesn't support the Athlon optimizations, and I was thinking about switching to GCC 3.0.4/3.1.0 before I compile XFree86/KDE (my system was a mess, so I reinstalled everything again and wrote off my previous install as a learning experience), but if GCC 3.0.4/3.1.0 are buggier than 2.95.3, I guess I can stick w/ my current compiler.

Also, do the Athlon optimizations in the new compilers(using '-O3 -march=athlon') make a noticeable difference compared to just using '-O3 -march=i686' in GCC 2.95.3?