[ILUG] Evolution - IMAP behaviour

[kevin]

I recently switched from Thunderbird to Evolution on Debian Squeeze. I
notice that after some time the folders in the IMAP mail boxes no longer
fold/unfold. I haven't been able to identify any pattern in the
behaviour, it just happens after a couple of hours use. I never saw this
behaviour in Thunderbird so I guess its related to the mail client and
not the Dovecot server. If I restart evolution everything works just
fine for another few hours.

Anyone seen/fixed this?

Kevin.