Skype has released Skype 220.127.116.117 to block a critical vulnerability related to receiving a malicious file via an instant message. Also resolved are problems with video freezing in networks with high packet loss, and unspecified minor bugs. Unfortunately, the horrid design of Skype 5 remains in place, but, luckily, the still-functional Skype 2.8 does not suffer from Skype 5’s security vulnerability. So, you can either upgrade to Skype 18.104.22.1687 or stick with (or downgrade to) Skype 2.8. I recommend downloading manually; the automatic updater failed when I chose Skype > Check for Updates. (Free, 20.2 MB)
Open a Finder Window with the App Switcher
If you don't have any Finder windows open and want to switch to the Finder and open a window in one fell swoop, bring up the app switcher with Command-Tab and tab over to the Finder icon. While still holding down Command, press the Option key, and then release the Command key. You're switched to the Finder, with a new default window open for you.
Set up short abbreviations which expand to larger bits of text,
such as "Tx" for "TextExpander". With the new custom keyboard,
you can expand abbreviations in any app, including Safari and
So as long as you have one of them, you should be fine from a security standpoint.