Some Skype users are reporting a bug sending instant messages to wrong contacts. The bug was first discussed in Skype’s user forums, and seems to have followed a June 2012 update of the software. Skype has confirmed the bug existence and that a fix is in the works. The Luxemburg-owned company has as many as 40 million people using its service at a time during peak periods. The company characterizes the bug as “rare” and says it is working hard to fix it, but did not elaborate further.
Source: https://thehackernews.com/2012/07/skype-privacy-bug-that-can-send.html