Hi, I have developed a web site for a customer where he add some ZClass instances that are zcatalog-aware. Everytime he edits the instances i do a reindex_object after the commit of the changes. I'm using the uniqueValuesFor () method do get the values of a field index on some forms but i found a quite strange behaviour. When he adds an instance , the value of the instace's indexed property is added (if the value is new) to the list that uniqueValuesFor returns....fine...it's correct . But when he deletes that instance, the uniqueValuesFor method still returns that value even if it should not be on the index. I think there is a problem of index referesh, but i have to do a full reindex to return the right list (e.g. without "dead" values). Im using Zope 2.2.0 and the catalog is running with subtransaction disabled . I have tried it on Zope 2.2.4 as well with the same results. Has anyone a workaround for that problem? I'm doing something bad? please help me! Alberto