I had a Fragramatic vacuum problem which in theory could never happen, it has happen three times to me though. The stupid coin chute somehow jams with quarters. This is a picture of where it jammed from the bottom end.
It seems that somehow the quarters get caught on the side weld, but I have no clue.
It is just a pain getting the quarters out and getting the coin chute out of the vacuum is no fun.
Second time: http://cwguy.com//?p=594
First time: I stuck a hanger in to pull the jam out, bad idea. Next thing I knew I had a hanger stuck also.