Grey "thread outlines" in the new visual appearance do not line-up with the rounded corners of post headers. It seems as if the header should be a few pixels wider to "cover up" the top of the outline rectangle.
Screenshot:
http://schend.net/images/screenshots/slashdot/post_headers.png
Logged In: YES
user_id=1661828
Originator: YES
Sorry; forgot to include browser/OS information.
Firefox 2.0.0.13 on Windows Vista Ultimate.
Logged In: YES
user_id=3660
Originator: NO
Note: this is D1-only.