Microsoft released an updated build of Windows Live Essentials: 15.4.3555.0308, I hope this fixes a lot of the instabilities I have been experiencing in Windows Live Messenger.
I can truly say that WLM 2011 has been to most instable product from Microsoft I have ever used with so many crashes, freezes, 100% CPU etc.
What MS is saying about this release:
We released an update for Windows Live Essentials 2011 in all 48 languages. This minor release includes numerous updates across all of the programs in the Essential package, including Windows Live Messenger, Mail, Photo Gallery, Movie Maker, Family Safety, Writer, and Mesh. In the coming weeks, customers on Windows Vista SP2 and Windows 7 will receive a notification prompting them to upgrade to the new version. Since this release contains critical fixes for the Essentials package, in a few months, the update will become required for all eligible customers.
Current customers moving from Windows Live Essentials 2009 to 2011 will see a whole host of new features, including new social features in Windows Live Messenger, the ability to chat with Facebook friends, photo fuse in Photo Gallery, new themes in Movie Maker, and much more.