If you're a user of the recent Adium 1.0 beta releases, and you've been having issues connecting to AIM, you're not alone. According to reports in the official IRC channel and from developers, AOL did something to change the connection protocol, specifically involving the new joscar connection protocol, connection rate limiting, and buddy icon requests. Users experiencing problems have three options:
1. Take a break! Enjoy your newly found freedom from the constant barrage of instant messages.
2. Use a web-based IM service such as meebo.
3. Replace your Adium beta with the older .89.1 build.
Note: AOL responds to the rapid connections this problem causes by locking out your account for a few minutes. The more you try and connect while you're locked out, the longer the lock stays.