I installed the Mountain Lion upgrade and two things happened: the contextual menu for page and tab were reversed, plus I could no longer find the Facebook Server. I installed the 10.8.5 combined upgrade, which fixed the Facebook problem but not Safari. I'm stuck with Safari 6.0.5. Before the Mac App Store, it was possible to download just about everything. Now the only Safari upgrades I see on Apple's site are ancient versions. Despite 17 days of a constant exchange of support from Apple I couldn't even download ML via the App Store after purchasing it (server error on Apple's end). I ended up getting a copy on a thumb drive from the local Apple authorized service center.
I'm not frantic to upgrade, but I have to relearn the right click because of the contextual menu switch. It would be nice if I could reinstall the OS on a freshly wiped drive but my copy of CS6 master collection was a golden master download from Adobe, without backup and going back to CS4 is not the right move.
Thanks for the suggestion.