> Some images only capture a box frame with a 
> small red 'X' in the upper left corner, but no picture.  
> Despite this, the download shuts off claming that it is 
> complete.
> Does anyone have any suggestions?
This generally happends when the remote server send the 
file without giving any "Content-length" header ; that is, 
the file beint sent has an "unknown" size. Therefore, 
detecting the end of the file (connection closed) or 
detecting a broken connection (connection closed, too) is 
impossible.

Can you give me some URLs of broken jpg files? I'll check 
this hypothesis and see if the server is giving any valid 
size field. 

If if does, this might be a bug :)