I have been seeing this problem also. It is still present in 0.11.3-4, and the patch at https://sharesource.org/hg/pymsnt/rev/b704db19896a as detailed by the OP fixes the problem.
IMHO, the severity of 'normal' is not doing this bug justice. It causes copious amounts of traffic to be generated by pymsnt, as well as any MSN Messenger client connected to it. It has been saturating my home DSL connection in the upload direction for many months (I hadn't noticed because QoS hides the effects of the problem). James -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org