[Zope] Cache values may only be in one cache

[Jonas Nielsen]

I'm getting the following error:

"Cache values may only be in one cache"

I'm getting this error every time I refresh my skin product. So I have 
to remember to restart zope every time I make a change.

I'm running Plone 2.5.2 and Zope 2.9.6

On this page:

http://plone.org/documentation/error/one_cache

Wichert Akkerman says:

"""Zope no longer supports product refreshing fully. For products using 
the component architecture it will probably never work. For others it 
can break as well.

This is a Zope matter, not a Plone problem."""

Is this really true? Wouldn't it be an idea to remove the functionality 
completely then?