KMail even worse

[Peter Gueckel]

Another thing I noticed (I don't have enough emails saved to be able to verify 
this, as I unsubscribed from a mailing list I was on for a while)...

Try setting the view/message list/aggregation to standard. The threaded views 
seemed to be problematic, causing these mysterious crashes and program quits. 
Again, I cannot actually verify this and I don't have any threaded email 
correspondence saved, so I am not able to verify the problem, but standard view 
seemed to minimize the problem for me.