A fraudulent SSL certificate has been issued for some public Web sites belonging to Google by the certificate authority DigiNotar. Although DigiNotar has now revoked the fraudulent certificate, which should protect most users, it’s conceivable that users on a compromised network could be fooled into using a fraudulent Web site masquerading as a Google service. Because the extent of the problem isn’t yet clear, Mozilla has released Firefox 6.0.1 (along with updates to all other currently supported Mozilla software) to revoke trust in the DigiNotar root certificate, which you can also disable manually. There are no other changes, but it’s worth getting the update to avoid potential problems related to the fraudulent certificate. (Free, 28.1 MB, release notes)
Option-click to Hide Apps Quickly
This trick has been available in the Mac OS for years, but many people still don't know it. If you have too many windows cluttering up your screen, you can hide specific ones easily as you work. When you're in any application, hold down the Option key and click on another app's window, on the Dock, or in the Finder to switch to that other app and simultaneously hide all the windows in the previously current app.