I also have this problem under sid on alpha.
Running the script directly with /usr/bin/python2.3 instead of /usr/bin/python -> python2.4 works, however, so I suggest the problem is somewhere in python2.4, not bittorrent. That is, running "python2.3 /usr/bin/btdownloadcurses" works correctly as a temporary workaround.
Mark ~(0)$ apt-show-versions | grep python python/unstable uptodate 2.4.3-11 python-central/unstable uptodate 0.5.5 python-support/unstable uptodate 0.4.1 python2.4/unstable uptodate 2.4.3-8 python2.3/unstable uptodate 2.3.5-15 python2.4-minimal/unstable uptodate 2.4.3-8 python-minimal/unstable uptodate 2.4.3-11 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]