Linux standalone app crashing

[Doug Lerner]

I have an app I wrote and it works in OS X, OS 9 and Windows. But a
co-worker who uses Linux as his main desktop tried it just before and it
crashed on his system:

Suse 9.0 2.4.21-166-default #1 Thu Dec 18 18:23:14 UTC 2003 i686 i686 i386
GNU/Linux

with:

./WebXClient exiting on signal 11

Just at the point that a clone of an invisible stack was being created. This
was repeated several times and it crashed the same way just at the same
time.

Any hints as to what the problem might be?

Thanks,

Doug Lerner, Tokyo