Skype-Support is set to: Linux-users to update to Version 4.3
If you try as a Linux user with an old Version of Skype to log in, you receive an error message.
- Make sure you update your Version of Skype.
- Uninstalling it is best to use the old Version of Skype and install the latest Version.

Support for Skype set
Windows Phone 7, and Mac OS X 10.5 - Skype is set
On the Windows Phone 7, and on Mac OS X 10.5 the Skype set-service completely.
- You can use these devices to Skype then.
- An Update from Windows Phone 7 to Windows Phone 8 is not nearly all of the devices are possible.
- On your Macs, you can Update the operating system to start.
Read also what you can do when Skype is down.
