utorrent question

[nab]

I just upgraded to windows 7 this past weekend.  I'm not sure if utorrent is playing well with utorrent yet.  I keep getting the following messsage:

Torrent Error
File xxxxxxxxx
The Requested Operation Cannot be Performed With a
User-Mapped Section Open


I never saw this message when I was using XP and only once in my few months under Vista.  I've taken a look at the forums over at utorrent, and can't find anything that directly relates to this error. 

The torrent stops when this message occurs, and restarting it usually results in the same error in short order. 


Before I try and dig any deeper, I was wondering if any of you guys could shed some light on this error. 


Thanks