Mountain Lion, Safari & Time Machine compatibility
Since installing Lion, Safari (often) freezes when launched upon waking from sleep. In addition, Time Maching is unable to perform automatic back ups. My solutions to these problems are to make Fire Fox my default browser and do manually back up. I also avoid using Safari immediately after waking the computer up from a sleep. Shouldn't be this way, but until Apple fixes the problem in the next cat O.S.(Cheshire, maybe?), I find this arrangement workable.
Safari, Time Machine-OTHER, OS X Mountain Lion (10.8.2)