Procmail 3.11pre5 seg. faults on Solaris 2.5.1

I just finished compiling Procmail 3.11pre5 on my Solaris 2.5.1 machine.
It dies -- quickly -- with a segmentation fault.  This happened whether it
was compiled with gcc or with the standard Sun cc compiler.

Looking at the 'truss' (a process trace program) output, the fault occurs
very early on in the code.

Has anyone else seen this problem, or know what might be causing it?

Thanks,

  Lars