Another day, another run-in with police for Chris Brown: TMZ reports that the hip-hop bad boy's latest dust-up took place around 4:30am today in Washington, DC, where Brown has been charged with felony assault. Police say that Brown started arguing with a man around 4:30am today outside the W Hotel; things apparently went downhill, with Brown allegedly punching the man. Brown is reportedly cooling his heels in custody, while the man is being evaluated at a hospital. The bad news for Brown, TMZ notes, is that he's still on probation for assaulting Rihanna. In August, a judge ordered Brown to perform 1,000 hours of community service.