Pidgin 2.7.6 was released yesterday, fixing the "Unable to validate certificate" error for omega.contacts.msn.com (so if the 

If you're using Pidgin with MSN, you probably got lots of "omega.contacts.msn.com" certificate errors today. Here is how to fix it.

Emesene 1.5 brings a lot of new features and bugfixes, most notable being the webcam (video) support. Changes in 1.5:

* Compatible with the latest Window Live Messenger(tm)
* New plugin set (Plus! colors, Notifications, Mail check, etc.)
* HTTP connection and proxy support
* @msn accounts support

Previously, the way to connect to Twitter using Pidgin (IM client for yahoo, google talk, msn, etc), was to use a jabber account like google chat, then add Twitter. But Twitter shut down the Jabber service.  So it doesn’t work anymore. But now, Pidgin-microblog can do the trick.