Please describe the problem:
When Pan is started, any groups that were updated (new headers downloaded) are once again marked as unread, no matter if they were marked read upon exit or not.

Steps to reproduce:
1. Open pan, update headers in subscribed groups.
2. Read headers as desired, mark all groups read, exit Pan.
3. Re-open Pan, groups last updated are once again marked as unread.


Actual results:
As described above

Expected results:
Groups marked read should remain that way when Pan is closed and reopened.

Does this happen every time?
Yes, tested multiple times.

Other information: