It's happening more and more to me on this forum, however I cannot tell you a way to reproduce it exactly:
When I click on a post from the "What's New?" list, it should take me to the first unread post. But there are times when it just takes me to a random place on the (correct) page. Not even to a certain post. Once I ended up getting to the bottom half of an image.
This is NOT when the newest post cannot be placed to the top because the page is not that long. At those times I get put to the very bottom of the page. When this happens, I am not taken to the bottom of the page, but to a random, upper location on the page.