Yes I compiled python myself, using ./configure
--prefix=/usr/local/python2.6/ --with-pth --enable-shared

It is a 64-bit compile.

I've done this with both standard config and a config that I modded
which produces optimizations options as -ggdb3 -O0. Both contain the
segfault error.

We are including some external site packages, but there is no consistent
site package import or usage that causes the segfault, it just seems
that heavy stress with many threads going off has a race chance to cause it.

I can send any additional info that can help debug this issue