[Zope] zope2.6.3 and zclass+property sheets+catalog aware

[Bakhtiar A Hamid]

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