HI,
If in iChat > Preferences > General Section you elect to have all the Buddy List gathered in one list
then they can look like this. (It is Default to Collect them in one list)
As you can see my GoogleTalk ID has dropped out (Not a Status setting by me to Off Line or anything else)
It has the Sharply pointed Tilde like Symbol ~
Clicking that symbol confirm it is Off Line and that I should wait a few minutes and try again.
As you have a different Message it would seem that iChat is not accessing the KeyChain Properly.
Open Keychain Access in Application/Utilities
Highlight Login in the top left area if needed.
Highlight Passwords in lower left in needed.
Find the @mac.com name in th eright hand panel
Highlight and then use the i Button
In the new Panel, tick the Show Password Box
(enter your Password for your Login and Allow Once Button)
Does the Password now Show Up ?
Is it what you think it is ?
Edit if required and Save.
We may need to check if you have Ownership and Read and Write permissions on the Keychain if that does not help.
It is late where I am and it will be a while before I get back to further replies.
10:43 PM Thursday; March 8, 2012
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
iMac 2.5Ghz 5i 2011 (Lion 10.7.3)
G4/1GhzDual MDD (Leopard 10.5.8)
MacBookPro 2Gb (Snow Leopard 10.6.8)
Mac OS X (10.6.8),
"Limit the Logs to the Bits above Binary Images." No, Seriously