Skype has released for a short time the Universal binaries version of its well known application as version 1.4.0.39, but then pull it out from its website couple of hours later after many bugs were reported by MacIntel users.
The last version currently available on their website is the 1.4.0.35.
The final UB version is now announced to be released in May.
www.skype.com
So do not try to download it from websites that have made it available via mirror download sites; it is urgent to wait.