What does "iTunes err = -3259" mean? I am downloading some iTunes U content in iTunes and am getting 

stopped (err = -3259)


on a number of the downloads.  I was hoping to find a list of err codes, but no luck.  Found a lot of forum posts for other error numbers, but not that one.  

Any help?
I turned off "Allow simultaneous downloads" and now it is consistently downloading without a problem.