As per title. The count of unread article is dead for me in 3.13. The count never updates.
Example: feed has 15 new articles, but count shows 4 (The number it was when I upgraded from 3.12 to 3.13).
Updating the feed adds 20 new articles, but the unread count still shows 4. Reading all 35 new articles 1 by 1 still displays "4 unread". "Mark this feed read" *does* however reset the number of unread. After that, the count remains zero forever, even if new articles come in. The unread count is dead.
"Hide read feeds" will hide feeds that still have unread articles in them (but unread count is displayed as zero).
"Refresh unread count" does not solve the issue.