Skype 6.4.0.833
Microsoft has released Skype 6.4 with a new scheme for scrolling through your chat history. With the new “infinite chat scrolling,” you’ll be able to continually view more messages as you scroll upward through your history. You can also choose to jump to a specific time period by Control-clicking within the chat (your chat history will be indexed at your first login after installing the update). The release also redesigns the search interface within chat to be part of the chat view (and not open in a separate window), improves the way multiple contacts are sent and received, and adds support for Simplified Chinese, but it also removes custom chat
styles for better design consistency across all operating systems. Skype may not prompt you to update automatically, but you can always choose Skype > Check for Updates to get the latest version. (Free, 39.6 MB, release notes)
Well, the update would not begin at first, not complete later. I had a clean install of a recent version (6.2.0.1117) that I did easily on my new MacAir (2 GHz Intel Core i7 with 8 GB 1600 MHz DDR3).
When the update would not start, I opened the App to see what permissions were set and found that I (admin) was not there but something called "Fetching" was. I added myself with read/write and tried again, now three times; no dice.
The behavior is that the update proceeds (seems to download, progress bar opens and fills out) but update itself does not install "on quit" or otherwise, nor can I find what supposedly downloaded.
The not-so-old version works, but I'm at a loss to say what is going on or how to get out of this rut.
You can directly download a version that uses Apple's installer from their web page:
http://www.skype.com/en/download-skype/skype-for-mac/