[Zope] __len__ Errors

[Scott Burton]

Title: __len__ Errors

I seem to be getting __len__ errors: Error type: exceptions.AttributeError
Error value: __len__
When accessing any method with an <dtml-in > loop.
I am running 2.1.6, with the current hot fixes. It seems to have started after installing the hot fixes.
I can replicate it with a simple <dtml-in> loop in a method. I read somewhere about the hotfix changing objects ownerships. Could this be causing this? If so, how do I remove a hotfix? It has rendered my discussion groups useless.

TIA

Scott