Since I've already proven the "shadows" portion to Sean's approval, I'll now prove the "left breast lift" portion as well. This solution is incredibly simple, requires no magic garment, and fits completely within what we know about the event.
I've simply extended the photograph below the bottom, using my imagination to fill in the details:
Now I'm no painter, and I have considerable trouble with anatomy, but I feel that despite the flaws in my rendering, this is a representation of a completely plausible situation. Sure, we don't know that this is what actually happened, but I feel that anyone would have to admit that a table could certainly account for Harry's "weight bearing" arm, the lifted breast, and the mystery "floating lemon wedge" -- which, inexplicably, was never initially questioned.
Q E D.
UPDATE: Crap! Foiled again. On to the next round, I guess...