I only have 1 style on my test site. I added to the .newpost
color: #fc4545;
font-weight: bold;
Okay, I'm guessing that
.newpost is new in 7.1 since it's not in my 7.0... I just erased my entire reply. lol Sorry I can't help since I gotta wait for the non-beta final...
...but if you PM me a link and perhaps even CP access, tomorrow I might be able to track it down or at least confirm it...