I just upgraded my skype to 184.108.40.2067 on my mac machine, now I can see a list of unknown contacts under my contacts. They are for sure the ones that I do not know. Can you please tell my how they got added to my contact list. They are numerous.
Your Mac Address Book contacts, I guess.
Go to Skype preferences >>> General
and there, untick "Show Address Book contacts" checkbox.
No luck. I tried to uncheck that option but the unknown contacts are still showing up there in my list. Note that I event tried by restarting my skype.
Facebook contacts ?
Then, maybe someone else has sent his contacts list to you.