I'm also having the same issue as above in Ubuntu 13.04. The progress bar stops at 729,1 MB for file transfer of 6,6 GB. After a few minutes it tels me that the transfer will take 1 hour and 2 minutes (1,6 MB/sec) but nothing happens after that. After 15 minutes there is no update and the transfer doesn't seem to have progress at all so I have to cancel.
I'm also having the same issue as above in Ubuntu 13.04. The progress bar stops at 729,1 MB for file transfer of 6,6 GB. After a few minutes it tels me that the transfer will take 1 hour and 2 minutes (1,6 MB/sec) but nothing happens after that. After 15 minutes there is no update and the transfer doesn't seem to have progress at all so I have to cancel.