Try adding objects to your Zope, if that works and they stick around even after you restart Zope, then this isn't so much of a problem.
However, it's nasty, and I suspect you find you may not be able to store objects to disk, so this does need fixing :-(
Please file on http://collector.zope.org
I love the ease of adding zope instances in 2.7!! After some further investigation I have found that a product that I am developing is causing the error to appear. The product appears to work fine in zope. I can add it, create objects with it and the objects are persistent. Can someone give me some advice on how to go about debugging my product to identify the offending code? The error appears in the following environments: SuSE 8.2 -- Zope 2.6.1 WinXP Pro -- Zope 2.7.x Thanks, Mike