I don't know what's the point in releasing these updates when it can't seem to fix any issues. I don't understand what these ******s Apple engineers are doing anyway. After taking forever with 10.8.3, I had hoped that it will fix some of the annoying problems like OS X hang once a week that I'm having with my rMBP. I hate to say Apple really sucks! I wasted 3000 Euro on this machine with an OS that is **** OS in the history of Mac OS X!
10.8.3 did fix bugs, and some notable ones. If your computer is hanging once a week, you are having a different problem that an OS update may not solve; it's not normal operation.