The space bar will always make a beeping noise when you activate it the first time on a blank drawing area. As for the Alt key press it activate the top menu but it doesn't scroll through them only highlights the "File Menu" but once your drawing no. You have to remember therefore that tools have been added so shortcuts have been added also but most commands that I use haven't change since CS since I started using Illy. You can do a search for a printable card but here are the main ones for CS6: http://jetsetcom.net/images/download...2012_08_03.pdf

I find that CS6 is the most stable version that I have owned, never crashed, so maybe you might need to re-install and run as admin. to get the best install.