You can’t win them all
In a showing that runs thoroughly contrary to all appearances in our month and a half of beta testing, Adium 0.83 has provided us with some unanticipated difficulties. The result is that a number of people are not seeing their entire buddy list after updating. An updated, working release of Adium 0.83 will be available shortly. In the meantime we have reverted the site to provide Adium 0.82 which should continue to work as expected. Adium Trac ticket #1272 is the releveant issue ticket for the problem. Thanks for your patience and understanding.