Using Selfoss 2.9 (but it also happened with 2.8) with Ubuntu server and PHP 5.3.2.

If I select the "unread" list and then click the "Mark are unread" button, I expect the number of unread items to go to zero. In fact, nothing happens.

However, if I select the "newest" list and hit "Mark as unread", all the items in that list go grey (and therefore I assume into "read" state).

Anyone know if I can do anything about this? My "unread" list is currently at bout 10,000 and growing.