Hackers can get your IP through Skype by just sending a link, no click required
Hackers can get your IP through Skype by just sending a link, no click required

Hackers Can Silently Grab Your IP Through Skype. Microsoft Is In No Rush to Fix It

There is a discussion on Hacker News, but feel free to comment here as well.
I remember a time when skype was p2p and it was easy to find IPs with netstat
ICQ, IRC, MSN, AOL... They all had this problem long enough ago