Skype Technologies updated its popular Skype Internet telephony software on Tuesday to <A HREF="http://news.zdnet.com/2100-1009_22-5913631.html?tag=zdnn.alert">fix a pair of security bugs.</A> The most serious flaw could allow an attacker to commandeer a user's PC. That flaw, which is similar to a bug Skype fixed last year, affects only Skype for Windows. An attacker could exploit the flaw by crafting a special link and enticing a user to click on it. The flaw could also be exploited when importing user information from a malformed electronic business card, or VCARD.