Can't add yahoo buddies anymore

[Dewdman42]

Suddenly within the past week Adium is acting up on me and won't let me add any new yahoo friend's. Whenever I try to add someone I get the following dialog: "Unable to add buddy to server list, unable to add buddy xyz to group abc to the server list on account mymyselfandi"

After clicking ok, I see the user added at the bottom of the contact list (offline), but Im' not sure if it actually got added, I think not.

If I quit adium and start it, I can sometimes add one user without the dialog error, but after that when I open a chat window for the user, the same message is displayed in the chat window, or something similar that this user is somehow broken.

Does anyone have any idea what may be wrong or how I can fix it?

[GregoriusM]

I have been having the same problem. I've had to resort to using Yahoo Messenger on my OSX 10,8 Mountain Lion.

And when I can't add a buddy, I still get the buddy's name in the List and under it it says "Not on server list".

I cannot delete those items. I've tried to add a buddy 3 or 4 times, and therefore have 3 or 4 "Not on server list" entries in my Buddy List. I actually have ones in the list that I remove, but if I relaunch Adium they are right back there, and these are from a couple of YEARS ago!

So, two questions: 1) How can I add Yahoo buddies, and 2) How can I remove the "Not on server list" ones PERMANENTLY?

Thank you for any help!

Greg