The problem occurs with a podcast from BBC:
http://downloads.bbc.co.uk/podcasts/worldservice/how2/rss.xml
Juice download the file until it reaches 100% but never mark it as downloaded.
If the catchup button is pressed, Juice download again the same file.
The file remains forever in "downloading" status.
screenshot with a podcast showing 100%
Logged In: YES
user_id=550717
Originator: YES
File Added: juicebug2.JPG
Logged In: YES
user_id=550717
Originator: YES
File Added: juicebug3.JPG
Logged In: YES
user_id=550717
Originator: YES
File Added: juicebug4.JPG