Getting core file from Python/Linux

[Jon Prettyman]

I'm running Zope with Python 1.5.2 and RedHat Linux 6.1 kernel
2.2.12-20 and my process is getting SEGV's but I'm not getting any
core files generated.  My startup script explicitly sets ``ulimit -c
unlimited'' (and echos ulimit -a to show it's set that way.)  But when
my process barfs I get no core.  

I'm able to generate python cores on an OpenLinux box running kernel
2.2.10.

-Jon