[racket] DrRacket 5.2.1 keeps crashing after start on Mac OS X Lion

> since today, and for no reason I can discern, DrRacket (5.2.1) keeps crashing when I try to run it under Mac OS X Lion (10.7.3). Here is what I see when I try to run it from the Terminal:
>
> s0627:Racket v5.2.1 roessling$ ./DrRacket.app/Contents/MacOS/DrRacket
> read-bitmap: expects type <path-string or input-port> as 1st argument, given: '#(#<procedure:draw-honu> 270 270); other arguments were: 'unknown/alpha #f #t

Hello!

Have you gotten a message from others yet?  See:

    http://lists.racket-lang.org/users/archive/2012-March/051156.html

If you download and reinstall Racket from the web site,

    http://racket-lang.org/download/

it should no longer have this error.