kmail 5.9.1 experience -- the early hours

suse tumbleweed gave me kmail 5.9.1 today, and i've been using it for about 
two hours. so far it has not hung, which is high praise. i've watched it move 
messages from one imap account to another, even while scanning folders in both 
accounts. i've watched it remember some message moves where the destination 
server was in offline mode, and then complete those moves after that server 
came back online. any of these things would have required restarting kmail at 
least once, and restarting akonadi at least once, and possibly doing a vacuum 
and an fsck, under 5.9.0.

so, kudos to the dev team, it looks like we have better mutex discipline now.

vixie