Comment 2 for bug 1082954

This seem to be affecting only 64 bit version of Ubuntu 12.10 after last update.
http://community.skype.com/t5/Linux/Can-t-login-with-Microsoft-account-with-4-1-and-Ubuntu-12-10/td-p/1235208
I can confirm that this is still an issue in 64 bit Ubuntu 12.10