It does have one weird behavior that I think I've identified. You might start out with 2 or 3 pages of "unread posts", but by the time you go through a number of the ones you want to read, the number of pages has reduced, making it difficult to locate the ones that used to be on page 3 that are now on page 2.
As a workaround, before I click on the next page number, I try to remember which item was at the bottom of the current page, and then look for that on on the next page to see where to continue. It's a nuisance, but I can live with it.
Eric, I commented on that a while ago (look above in this thread, I think).
The answer lies, I conclude, in the fact that the new software refreshes the search under certain circumstances (such as when you post a reply), so that posts which were new when you first arrived but which you have now read disappear. I don't regard that as an improvement but I can understand how it happens.
Sometimes, I hit command-R to refresh the page before I try to move from it. When the site is busy, that has the advantage that it picks up new posts since you arrived.
Does anyone other than me miss the "your last visit was at xx" which used to greet us when we returned under the old system? Could it be restored? I'd rather have it than "Hey, kikashi!" but I'm an old fogey.