With a plethora of musicians suffering recent injuries, bed rest and hospital bills are replacing sex and drugs in rock & roll’s holy trinity. During an Anchorage concert last week, Aerosmith’s Steven Tyler tore cartilage in his knee, was operated on and is facing 12 weeks of recuperation. (The band’s North American tour is on hold pending his return.) Tyler’s injury comes within a year of the hip replacement needed by John Popper (Blues Traveler’s harmonica-blowing leader), Bob Dylan’s heart infection and Neil Young’s sliced finger. A word to Dave Matthews: Stop tempting fate (and your health) by singing “Crash Into Me” in front of stage-diving audiences.