Here is a hack to solve this problem:
change file /usr/lib/python2.5/site-packages/BitTorrent/Storage.py
modify line 216
Code:
str(os.path.getmtime(filename)) + '\n')
to
Code:
str(int(os.path.getmtime(filename))) + '\n')
remove the binaries
rm /usr/lib/python2.5/site-packages/BitTorrent/Storage.pyo
rm /usr/lib/python2.5/site-packages/BitTorrent/Storage.pyc