[racket] freeze and bounding boxes

Is this intended for freeze?  (BTW: freeze just saved an otherwise 
unplayable game for me, so thank you!)

 > (square 20 "outline" "solid")
... 20x20 outline of a square....

 > (freeze (rectangle 20 20 "outline" "solid"))
... 20x20 outline minus bottom and right edges of a square...

 > (freeze 21 21 (rectangle 20 20 "outline" "solid"))
... 21x21 outline of a square that looks like example 1...

David