With Yahoo! Messenger open on my Macbook (OS X 10.8.2), I closed my laptop for a couple of hours. I have done this before without problem. However, last night, when I opened my laptop, Yahoo! Messenger had disconnected from the network and logged me out. With the network connection now re-established, I attempted to logon and use Yahoo! Messenger with the same account I had previously used, but no success. Either the login fails or the wheel just spins.
Also, I had saved this Yahoo! ID along with three others. The other two remain as options to select when logging in. However, the Yahoo! ID I was using when I closed the laptop is no longer available. I have to re-enter the Yahoo! ID and password now.