Bug in Skype sends last IM to another contact.
Published on July 17, 2012.
Skype users has reported a bug in Skype 5.10 for Windows, Skype 5.8 for Mac, Skype 4.0 for Linux and Skype 1.2 for Windows phone which after crashing the app send the last IM to a different IM contact when the Skype client is rebooted.
Skype is aware of the bug and they will be announcing the patch in the next few days. Also, Skype recommends updating to the latest client available.