[Zope-dev] ZCatalog bug, probably BTrees, what Zope version is this fixed in?

Hi, I have a ZCatalog search that returns 213 results. As soon as I add a sort_on and sort_order to the request doing this search, the number of results drops to about 60. This reminds me of some bugs in the BTrees package that I remember being solved in the not too distant past. Can someone please confirm to me what version of Zope I need to use to get these fixes? If it's not in a release yet, _please_ can it make it for 2.4.2. cheers, Chris