Richard,
I work with Chris and I have been playing with the CommandBar and our COM component. The error occurs if I create an instance of the COM component and then access the CommandBar.
After executing the above code, I simply click on the CommandBar option to Add / Remove the buttons. I get the stack overflow as soon as I uncheck one of the buttons on the command bar.
I have a small sample that I can send you - what is the best way to send it?
Thanks,
Ed