If you use Skype on Windows, you might want to make sure that you're running the most recent version. Skype Journal, among others, lets us know that Skype has released a hotfix for a potentially serious cross-zone scripting bug within the Skype client. As near as I can tell, this bug is only relevant to the Windows version of Skype. Mac, Linux, and other platforms.

This new version also includes a very important security issue-one which they need to bring into the Linux and Mac versions of the Skype client pronto. It is a whitelist and blacklist for the Skype API. This will help prevent the spread of malware through the Skype API. While malware isn't a huge issue on Linux and Windows, that doesn't mean this important security feature shouldn't be included.