I use Thunderbird for a number of POP and IMAP accounts. When I click on the inbox for an IMAP account the screen does not change - I have to move my mouse over the screen to 'force' it to refresh to show the emails in the inbox of that account. I've started in Safe Mode and the problem is not there. In safe mode I click on any IMAP account inbox and the list of emails for that account instantly refreshes . I've removed every add-in (mostly to sync with my Google calendars and to get UK spelling) and have no themes - but still get the same problem (i.e. click on an IMAP inbox and the screen listing emails doesn't refresh until i move my mouse over the screen). Start in safe mode and the screen refreshes normally - click on a different IMAP inbox and the list of emails in that inbox instantly changes to show the emails in that inbox. Help!