I used to log in and see a link to search for posts which I hadn't yet read. I no longer see the option to search for this. What happened to it? I miss it!
We just did a big upgrade to the forum software (though I admit I wasn't expecting to have it done over the weekend) and while we make an effort towards consistency it looks like that slipped through. The "Unread Posts" link in the top-right was a customization that we added a while ago and we'll have to add back in.