For anyone who’s been having the same problem with the Ubuntu package pidgin-microblog:
I’ve been using a plugin for Pidgin called pidgin-microblog that allows me to receive twitter updates via a pidgin tab, and post to twitter in that same conversation. It’s pretty sweet. Anyway, recently (possibly since I upgraded to jaunty,) it has been sending me the same messages over and over every 15 seconds or so, to the point where I had to disable the plugin because it was annoying and occasionally crashing pidgin.
The solution was to apt-get purge pidgin-microblog and then reinstall it. The reinstall wasn’t entirely straightforward — I had been using a custom repository in my /etc/apt/sources.list which the upgrade to jaunty automatically commented out for me, which I had to uncomment for the reinstall to work. As an aside, all of my other custom repositories were also commented out from the upgrade (just FYI).