Mac OSX has its 2nd major update since its release in March of this year, now at 10.1.2 (I like to call it 10.2) this update contains a number of fixes, some of which are listed below.
The 10.1.2 update delivers improvements and new functionality, including:
View: How to Upgrade page
View: Upgrade to 10.1.2 (Applecare account required)
News source: Betastream