[Evolution] Evo die with excessive disk activity

[Al Active <LLLActive GMX Net>]

Hi,

Once or twice a week my Evo 2.4 2.4.0 (evolution --version; in SuSE 10.0
purchased boxed version with regular YOU updates to date) slows down the
complete system to almost standstill with very high disk access. Only
with Ctrl-Alt-F2 -> ps -A -> kill PID(evolution-2.4) does the system
come to life again. I can start evo again (takes quite a long time to
come up), but have then to close properly again to have a few days of
peaceful work (experience showed it was stable for a while longer after
a proper close-down).
 
Any ideas what Evo does when it goes in the tight spin? How can it be
prevented or solved?

:-)
Al