. Here's a simple suggestion: after loading the site and browsing a few pages involving ZClasses, flush the ZODB cache and see if the bug appears right away. If so, it's probably occurring as a result of deactivation. Shane ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )