Anyone use iEatBrainz?

I ran iEatBrainz (http://musicbrainz.org/) and ran it through a  
playlist to fingerprint a bunch of songs and get artisst/album info.   
This works fine, but when I try to update the tags, I get the  
following error:

	Can’t make «class pDID» of {«class cFlT» id 35417 of
	«class cLiP» id 25125 of «class cSrc» id 51 of
	application "iTunes"} into type string. (-1700)

I ran it again and selected only about 30 songs to update, and got the  
same error.

OK, fine, I ran it again and selected just one song to update.    You  
guessed it:

	Can’t make «class pDID» of {«class cFlT» id 35417
	of «class cLiP» id 25125 of «class cSrc» id 51 of
	application "iTunes"} into type string. (-1700)

OK, so maybe it's the first song in the list that is the problem....

	Can’t make «class pDID» of {«class cFlT» id 37976
	of «class cLiP» id 25125 of «class cSrc» id 51 of
	application "iTunes"} into type string. (-1700)

Sigh.  The app has no way to recover from this error, btw, and must be  
force-quit.

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