Skype has released Skype 18.104.22.1687 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 22.214.171.1247 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)
Extend Mac OS X's Screenshots
Mac OS X has a variety of built in screenshot methods. Here's a look at a few that offer more versatility than the basic full-screen capture (Command-Shift-3):
• Press Command-Shift-4 and you'll get a crosshair cursor with which you can drag to select and capture a certain area of the screen.
• Press Command-Shift-4-Space to select the entire window that the cursor is over, clicking on the window will then capture it. The resulting screenshot will even get a nice drop shadow.
• Hold down the Space bar after dragging out a selection window to move your selection rectangle around on the screen.
• Hold down Shift after dragging out a selection to constrain the selection in either horizontal or vertical orientation, depending on the direction of your drag.
• Hold down Option after dragging out a selection to expand the selection window around a center point.
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So as long as you have one of them, you should be fine from a security standpoint.