The problem only affects Skype 5.10 for Windows, 5.8 for Mac, 4.0 for Linux, and 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”, Skype said in its security update.
In the update, Skype also fixed a problem with file sending on the desktop versions of Skype where users who have a hard disk drive in FAT32 format were not able to save files.
Skype said that the hotfix will be rolled out in the next few days. Users can download the latest version of Skype from the website or use the program’s auto-update to install the new version.