Ice from external tank hit Shuttle at launch

In the Here We Go Again department: it looks like a small piece of ice hit the Shuttle's underside on the way up yesterday. The chunk was 4 inches long and came off the external tank. The astronauts took hi-def images of the Orbiter yesterday and will no doubt be poring over them again today. I have no other info about this, but if I hear anything I'll post, of course.