From the New York Times:
If the president gets his way, in 2011 the top two income tax rates — now 33 percent and 35 percent — would revert to the levels before the Bush administration, 36 percent and 39.6 percent, respectively…. Republicans … say Mr. Obama is about to spring a big tax increase on many small-business owners who file their taxes as individuals. Analyses from the Joint Committee on Taxation and the Tax Policy Center, a nonpartisan research organization, show that less than 3 percent of filers with small-business income pay at the top two income tax rates, and many of those are doctors and lawyers in partnerships.
More on this from Howard Gleckman.