tesellation problem w/ Mesa

Hello folks!
I send this post to ask some help for a problem that drives me crazy: I’m trying to tesselate 3d ACIS objects using the glu tesselator. There is no problem with Windows98 and VC++, but using Mesa under linux the same program makes a seg. fault in the glu function “heap_cleanup () from /usr/local/lib/libGLU.so.1” (gdb snapshot)
The problem is that it doesn’t happen with every object, although they are all looking good under windows?
Perhaps there are some bugs in Mesa glu?
does anybody have an idea or a clue?