A federal appeals court <A HREF="http://news.zdnet.com/2100-9588_22-5766583.html?tag=zdnn.alert">overturned a ruling against adware maker WhenU</A> that held it violated the trademarks of vision specialist 1-800-Contacts in the sale and distribution of pop-up advertising. The ruling, delivered Monday by the 2nd U.S. Court of Appeals, reversed an earlier decision that confined WhenU from selling pop-ups triggered by 1-800-Contacts' trademarks, in violation of the Lanham Act, the U.S. trademark act.