hi just upgraded my zope 2.6.1 to zope2.6.3 and went thru hell :P the setup: i have a CatalogAware ZClass (sorry, this has been in existence since early 2000) that uses propertysheets to store properties. this has worked since zope2.0 till zope 2.6.1(well, actually the zope version is between zope 2.6.1 and zope2.6.2, from cvs) last night i upgraded to zope2.6.3, and everything looked ok. but when users tried adding in the zclass instance, or updating older instance, the propertysheets never got changed! that makes users mad. this zclass also works on zope2.7.0b3, that i can be sure. i haven;t yet tried this on zope2.7.0b4 i also tried another simple zclass and that b0rked too. i then created a new zclass, that subclass ZClass: objectManager, nad put in two properties of string and text. adding an instance shows the same problem. no tracebacks. everything adds fine. just nothing in the properties :P the question: what might have cause this trouble? CHANGES.txt mentioned some changes with PropertyManager. but the affected fileds/types used in my ZClass are mostly text and string thanks for any hints and help