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)
Mac OS X Zip Expanding Utility
Firefox (and possibly other applications) may ask you what you want to do with .zip archives that you download from the Internet. If you want to expand them with Mac OS X (rather than StuffIt Expander), you may be unsure of which application actually does the job. You're looking for Archive Utility (in Leopard and later) or BOMArchiveHelper (in Tiger). In either case, the application is stored in Hard Drive/System/Library/Core Services/. Don't move it from there, though, or you'll confuse matters.