I've looked into web-bug 4510 and the attached patch fixes this bug, but then tw2318b fails.
I seems like that the VMT of an interface (IUnknown) isn't initialised properly when the constructor of the accompanying class is called.
When the VMT isn't initialised properly an RTE 210 should occur. The patch in the attachment disables the test that raises the RTE 210. This surely isn't the right fix, but it's beyong my knowledge to fix this properly.
I hope someone else can have a further ,
Joost.