[Zope] about Zope 2.6.0 stability

Hello, has anyone get some problem with Zope 2.6.0 stability ?? I got some strange random errors, like - error 5 input/ouput ... - files not found, then they came back after a zope restart ... many strange things, that they are repaired after a restart. Perhaps some incompatible with products ? I'm just using : - TransparentFolder - HTML widgets - a simple Product I've developed with Zope 2.4.1 Have you got a idea, a tips for tracking ? thanx for reading ;o) Cyrille