After I reply to a post, if I click the "New Posts" link in the menu my just submitted post does not appear in the list of New Posts. I'm sure it used to appear in the previous version of the SP website and I'm pretty sure it initially appeared after the website upgrade. The only way I can see if my post was actually accepted is to click the "Forums" button to see if my post appears as the latest post in a thread.
When someone else then submits another post in the thread I submitted my post in, the thread then reappears in the list of threads when I click "New Posts".
This "feature" is happening in both FF7 and IE9.