I followed a (vaguely sketchy) guide that was supposed to sort out everyone's message count in one go.
Mine is sorted - but then I knew it was supposed to be at 0 rather than 2.
Has it sorted other people's? I'm didn't run the full "fix" as it sorted mine out half way through.
If your unread count doesn't match was you think it should - let me know x
UPDATE: Hmm spoke too soon, I was able to clesar the new messages count at the top, but once I open my inbox it still shows a (2) where there shouldn't be :/