Have just upgraded to Zope 2.5.0 running on Python 2.1.2 and am experiencing python.core dumps when I do nothing more than click on folders (no transactions, no editing). Probably the best thing about it is that it only takes 8 or 9 clicks before it crashes so it's very reproducible. Have run this with gdb and got this ~ (gdb) c Continuing. Program received signal SIGSEGV, Segmentation fault. 0x8093eaf in PyTuple_New () Is this a known bug ? I've imported a few of my previous packages and that's about it. What should I be looking out for or is there anything else I can do to debug further ? Am running on FreeBSD4.4 Release. Failing my ability to get this running, does anybody have a recommendation for a previous, very stable version of Zope. I'm still using pre-2.2 at the moment. TIA. chas