This one is rare and only occurs under certain situations. It is fairly minor, but annoying.
If you go to a post which is limited to one page, then click on Unread, the link works as expected.
If you go to a post where the first unread post is on any page other than the first, the link works as expected.
But, if there is a post with unread posts on page 1 and additional posts on a second page, the link takes you to page two and marks the posts on page 1 as read.
BTW, I really miss the option of having a link to the first unread post beside the post topic listing on the Unread Post page.
Yes, I have noticed that, too. Noticed it a week or two ago, but thought maybe it was a glitch. But it happened again tonight on one of the threads.