Reset scroll direction in OSX Lion
After you installed new version of OSX Lion, you’ll notice that mouse/touchpad scroll reversely when you scroll web pages and some apps like Launchpad. It look very weird for me first time and I have to disable it by going to Setting Preferences -> Mouse -> Point & Click and tick off Scroll direction: natural.
I have been testing this reverse feature and getting used to it now. You should try if you’re comfortable with it.