I've been having this issue for a while now (1-2 months maybe) where some threads aren't properly showing the last read post, so when I go to my User CP and check subscriptions, threads I'm caught up on will still show as bold and send me a page or three back when I click the "Go to first new post" button.
Tested in Chrome and IE and I don't have the issue in IE, so appears to be a Chrome issue. Using version 24.0.1312.52 m.
Tested in Chrome and IE and I don't have the issue in IE, so appears to be a Chrome issue. Using version 24.0.1312.52 m.