Hi, Since moving one of our servers from Zope 2.2.4 to 2.3.1b1, we've been frequently getting this weird error when trying to do something that requires an object to be re-indexed in the Catalog: Error Type: AttributeError Error Value: 'tuple' object has no attribute 'append' Traceback: Traceback (innermost last): <snip> File /usr/local/zope/cases/Products/aProduct/aProduct.py, line xxx, in index_something (Object: Traversable) File /usr/local/zope/Zope-2.3.1b1-src/lib/python/Products/ZCatalog/ZCatalog.py, line 411, in catalog_object (Object: Traversable) File /usr/local/zope/Zope-2.3.1b1-src/lib/python/Products/ZCatalog/Catalog.py, line 382, in catalogObject File /usr/local/zope/current/lib/python/SearchIndex/UnTextIndex.py, line 394, in index_object File /usr/local/zope/current/lib/python/SearchIndex/UnTextIndex.py, line 305, in insertReverseIndexEntry AttributeError: 'tuple' object has no attribute 'append' Any ideas what's going on here or how to fix it? cheers, Chris