Besides my problem with audio volume described here I have encountered same problems as other users:

1. when using modest IMAP with one of my accounts (not google) it says "message not on server" or something similar. After I delete local cache with rm from /home/user/.modest/cache/mail/imap/<Account Name>/folders/<Folder Name> everything seems fine again.

2. when receiving a SMS I get the default message sound instead of the on I had chosen. In profile settings there is my choice still selected.