Pavel Krivanek wrote:
> - extend UIManager to make the kernel independent on UI. It's about 30
> methods it means to take the current source and create the
> corresponding code in the MorphicUIManager or MVCUIManager

Ouch. This feels *extremely* wrong to me - you are making a user 
interface abstraction be responsible for the defaults in exception 
handling. Bad choice. What is wrong with the current implementations 
anyway? There is no UI dependency in any of the standard exception 
classes that I find in 3.9 (a few edge cases like 
ProgressInitiationException that don't belong into Kernel discounted).

Cheers,
   - Andreas