crash in the carbon event loop

Hi

I have a weird crash in the carbon RunApplicationEventLoop() function.
According to the backtrace it crash somewhere in this method without touching one of my event handler.
To be more precise mouse events work just fine but keyboard events seem to crash the application.
Whatever I do with the handlers doesn't seem to change anything...(like disabling keyboard or mouse events handler or whatever..)

I don't have a clue of what I am doing wrong so if someone had this kind of problems all advices are welcome..

Emmanuel Quetelard.