We are rolling out a hotfix over the next few days for multiple Skype clients to address a couple of known issues.
We recommend downloading the updated versions of Skype once they are available.
The affected Skype clients are: ◦Skype 5.10 for Windows
◦Skype 5.8 for Mac
◦Skype 4.0 for Linux
◦Skype 1.2 for Windows Phone
The hotfix addresses an issue that occurs only when a user's Skype client crashes during a Skype IM session, which may in some cases result in the last IM entered or sent prior to the crash being delivered to a different IM contact after the Skype client is rebooted or logged in as a new user. Although we cannot determine precisely how many users may have been affected by this error, we believe the number is small given the very specific circumstances under which the error occurs.
Read more at:
Skype - Skype Garage blog - Hotfix for multiple Skype clients