Skype has a couple security issues that are fixed by downloading the latest here.
"Our avid reader and contributor Juha-Matti let us know that there are two new vulnerabilities in the free IP telephone software Skype.
CVE entries: CVE-2005-3265
Secunia advisory: http://secunia.com/advisories/17305/
Please upgrade to the new version ASAP, they have been rated highly critical by Secunia, and high by Skype."