-----Original Message----- From: Brian Lloyd [mailto:Brian@digicool.com] While I won't totally rule out the possibility of something in Zope, the fact that we don't see this behavior seems to suggest that there might be something going awry in your particular ZClasses. In particular, I'd look for some difference in the way that it registers itself with the catalog at the time that it is created versus when it is "found" by the catalog. The difference could be a difference in either behavior, state or environment (i.e. is the acquisition context, etc. the same in both cases when the "absolute_url" method gets called to generate the url for the catalog? Is there any custom code around this logic?).

BTW, absolute_url did change to support virtual hosting in 2.x. This could be causing a problem in your ZClass constructors. Jason, try inspecting the return value of absolute_url in your constructors, you may have to prepend a / -Michel