Although the big news today from Apple is the release of iOS 6 for iPhone, iPad and iPod touch users, the Cupertino company has also taken the opportunity to release an update to OS X Mountain Lion, which moves up to 10.8.2. Given that the desktop department of Apple's two main operating systems now borrows many features of iOS, these simultaneous releases should be expected, and if you have upgraded to Mountain Lion, this is an update you most certainly won't want to miss.
Scarcely does a major software update release without bringing problems for at least some users, and whilst not everybody would consider OS X Mountain Lion as "major," it certainly presented many MacBook users with something of a headache.