As said before, crashes seem to be dependent on loaded components.   
Here's a few occurences, once with TIR enabled:   
    
Disabled TIR and tried again:   
    
Mail::Reader?   Again!   
    
Uh-huh.   
Doesn't seem very helpful. Hunch still points at broken clientside when the master server sends something unexpected.   
The other logs don't show anything interesting.