[Zope] Zope 2.7 Problems

Hi All, A while ago I started using Zope 2.7 instead of Zope 2.6. After this upgrade thing are not running as expected. Currently using Zope 2.7.2 Problem 1) Zope crashes spontaniously After running for a while the zope server stops responding. When I check the server the main zope thread is killed and the subthreads are running on there own without the parent proces. Problem 2) Zope leaks memory After installing zope 2.7 it looks like the server leaks a lot of memory. The memory keeps adding until the server runs out of memory. Does anyone know a solution to these problems. Greetings Ralph