plone: can't edit admin user in personalize_form if remember is installed

I wrote an email on this problem:

http://www.coactivate.org/projects/remember/lists/remember/archive/2010/05/1274516060487/forum_view

Now I think, I have an idea.

1. personalize_form calls Products/PlonePAS/tools/memberdata.py(243)canWriteProperty()
2. which leads to Products.PlonePAS-3.12-py2.4.egg/Products/PlonePAS/tools/memberdata.py(226)_memberdataHasProperty()
3. which does 'if mdata'
4. bool(mdata) results in 'False'
5. Stepping into it lands us in Products/BTreeFolder2/BTreeFolder2.py(511)__getattr__(), with name being '__nonzero__'. What kind of name is that?
6. http://docs.python.org/release/2.4/ref/customization.html informs us that bool tries to call  __nonzero__(), then __len__() and after that assumes True
7. So, because remembers portal_memberdata is a BTree, which has __len__, but is empty by default, this doesn't work.
8. Let Products.remember.tools.memberdata.MemberDataContainer have a __nonzero__.
9. Works like a charm!
10. But is this the right place - shoudn't rather Products/PlonePAS/tools/memberdata.py(226)_memberdataHasProperty() do a 'if mdata != None'?