> I just added a new test for the themes. If the integrity of a theme is 
> broken, one can just browse all senders of #userInterfaceTheme and 
> debug. I claim that it is quite simple to diagnose. :)

I am not too concerned by having the integrity of a theme broken. What I 
see more likely is objects accumulating silently in the stack until this 
becomes a problem.

Stef