I have the same issues, but with the following...
1: DHT is required for most torrents - this version discovers far fewer peers than the win app version.
2: The torrent app crashes after an hour or two regardless of what it is downloading
the crash usually results in 0 seeds and no upload or download
occassionally it crashes the whole box so my network shares/web interface etc are also inaccessable
The fix is always yank the power lead! Once rebooted it always runs fine.... for a while.
I have run my unit with opened ports and also in the DMZ incase the router was causing the issue.
My router is a DLink 524 which is notorious for causing problems. Is everybody else using on of these?
regards,
Sean.