Hi Gitte, I had the same problems (core dumps) on my zettai.net account, which is using FreeBSD. As you have suspected, it's a problem with the thread size on BSD.
I'm about to migrate a server from Linux (Mandrake 9.2) to FreeBSD-5.2.1. I have moved my Zope-2.7 instances without a problem. Now ... my 2.6.1 instances are not migrated very well. Some of them runs like a charm. Others core dumps when you access the sites for the first time. The same goes for one of my two 2.5 instances. It just crashes when the site is accessed for the first time.
Now I suspect python to be the problem here. With Zope-2.7 you needed to compile python with bigger thread size on BSD in order for it to work. Do I need to compile python with anything special to make them work with older Zope instances (I'm using python 2.1.3 for this).
For Python 2.1.3, follow these instructions: http://zettai.net/Members/george/python213FreeBSDPlone.blog/view For Python 2.3.3, follow these instructions: http://www.zettai.net/Howto/Zope27Python23Install/view Nate -- Nate Aune - natea@jazkarta.com Plone4Artists - http://plone4artists.org "Build your own artist community website!"