Last week I create 2 releases of #mbpurple (Microblog-purple), a plug-in for Pidgin that make you communicate with Microblog like twitter.com. Latest release is 0.1.2. These releases fix lots of bug that occurred when there's something wrong with network connection, which may crash Pidgin. At least for me it's very stable now. Also, a potential memory leak has been fixed too.
Download it at Microblog-Purple project page.