Would it be possible to get an up to date version on Twisted? According to yum, the available version is 2.5.0. According to the homepage, 8.1.0 is available.
This bug appears to have been reported against 'rawhide' during the Fedora 10 development cycle. Changing version to '10'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
*** This bug has been marked as a duplicate of bug 450227 ***