re: Loss of foam
It looks like we won't know (no cameras to picture that).
Meanwhile...
I wonder about something: the most crucial parts of the Shuttle are the wings leading edges..For a piece of foam to hit them, it must come from pretty far up on the ET...If a piece would get loose further downwards, the airstream between the ET and the orbiter might prevent it from hitting the shuttle at all (like with STS114) or if it did, it wouldn't be as crucial.