Yahoo changed how authentication to their servers works. The 1.4 nightly builds of Adium have been updated to be compatible, and hopefully we'll get a new 1.4 beta out soon. Backporting to 1.3.x may or may not happen, we're not sure yet.
Well that worked for me.Disconnect Yahoo.
Go under Preferences/Accounts/(your Yahoo account)/Options & change the server to 66.163.181.106.
Connect Yahoo.
In the future, you should probably change it back to the default and see if it works.
Disconnect Yahoo.
Go under Preferences/Accounts/(your Yahoo account)/Options & change the server to 66.163.181.106.
Connect Yahoo.
In the future, you should probably change it back to the default and see if it works.
Disconnect Yahoo.
Go under Preferences/Accounts/(your Yahoo account)/Options & change the server to 66.163.181.106.
Connect Yahoo.
In the future, you should probably change it back to the default and see if it works.