Incorrect unread-post counter

[Richie (Richie Rich)]

I’m seeing an incorrect value being displayed for the new-posts / unread posts counter on some topics here on meta.

It seems to be tracking posts which have been deleted:

[Moin]

Number of unread replies is different than number of topic replies due to reply deletions

We have had this reported a few times before, it is fiendishly hard to fix. If a large number of posts are deleted then unread count is artificially incredibly high. We could I guess do a client fix that caps numbers but it just replaces imperfect with more imperfect. Problem with counting deleted replies is that there is no cheap way of do it. You may have read 17 of the 32 deleted replies.

[Richie (Richie Rich)]

Ah, thank you @Moin