Evolution doesn't save state

[Jonathan Ryshpan]

Evolution takes a while to save its state on termination, and doesn't
seem to save it very often in normal use.  The result is that when the
system is halted and then restarted, a lot of messages that have been
read show up as unread on restarting.  Is there any way to cure this,
other than manually halting evolution before halting the system?  

Does Thunderbird have similar problems?  How hard is it to switch to
Thunderbird (anyway)?  Any problems importing folders?

Apologies if this isn't the right list.

Thanks - jon