Вот че пишут:
UPDATED: Some of you may be having problems logging in to Skype. Our engineering team has determined that it’s a software issue and hopes to have this resolved quickly. Meanwhile, you can simply leave your Skype client running and as soon as the issue is resolved, you will be logged in. We apologize for the inconvenience.
Вот че писали раньше:
Due to Peer-to-Peer network issues there are problems with Skype login. This issue is being investigated. We will give new updates when the issue has been resolved.
We apologize for any inconvenience.
И эти туда же — вначале написали, в чем причина, а потом потерли шустро.