python2.1 SEGV on Solaris 2.7

[Anthony Baxter]

I've got a Zope installation where python2.1 is segfaulting on 
Solaris2.7 - it's running a largish ZEO server. The tail of the
gdb output is:
 #128 0x26164 in PyEval_CallObjectWithKeywords ()
 #129 0x264c0 in PyEval_CallObjectWithKeywords ()
 #130 0x26140 in PyEval_CallObjectWithKeywords ()
 #131 0x25fc0 in PyEval_CallObjectWithKeywords ()
 #132 0x517bc in PyInstance_New ()
 #133 0x261a4 in PyEval_CallObjectWithKeywords ()
 #134 0x25fc0 in PyEval_CallObjectWithKeywords ()
 #135 0x42c90 in initgc ()

It's built with 
<anthony at devhost1>$ gcc -v
Reading specs from /opt/local/lib/gcc-lib/sparc-sun-solaris2.7/2.95.2/specs
gcc version 2.95.2 19991024 (release)
which is a bit old. 

Has anyone seen anything like this? I'm going to rebuild with
gcc3.0 and also try turning off GC. 

Any help appreciated.

Anthony