I gather it's because debian hasn't bothered to update past 0.25 and the fix is upstream in 0.26. And since gnome-btdownload has been dropped from the default install (a decision which I find inconsistent with Ubuntu offering bittorrent as a download option) there's no motive to maintain a more recent version in Feisty.
:-( -- "Address already in use" error with multiple downloads https://launchpad.net/bugs/57039 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs