[Evolution] death by "too many open files"?/emacs key bindings?

[Phil Sackinger]

I've noticed Evo 1.4.4 dying after, oh, about a week or so because of
"too many open files". 

An "lsof | grep evolution | wc" gives me 6748 lines.

Lots of entries say "can't identify protocol".

Is this:
 	an evo problem, 
	me with too many folders, or 
	a system limitation that I should fix (ulimit -n)?

On an unrelated matter, I'd like to get emacs style keybindings that I
enjoyed under Evo 1.2 and can't find in 1.4.

Thanks,
P.S.