categorization of "new posts" is pretty wonky.

Has anyone done a hack to make the determination of "new posts" more accurate?
Ideally, if you click on a thread it should take you to the last new post that you haven't seen.
However, how a post gets classified as a "new post" is if the posted date is newer than your last visit. This means I could have never clicked on a thread to see any of the posts, but it won't take me to the first post (as you would expect) but will instead to take you to some seemingly random post in the middle.

Anyone done any work to correct this?