I have had issues with alt+tab in Cord or Microsoft's RDC and cant figure out why. The Alt+tab wont cycle through windows. I CAN do Alt+Shift+Tab to cycle through the windows backwards in a cord or RDC. It doesnt matter if its full screen or not. Both left and Alt's act similarly. If I press Alt once, the file menu highlights like you would expect so it is indeed functioning in some way. I have a Microsoft Ergonomic4000 keyboard with their software installed. But unplugging it doesn't make a difference. I have deleted this file and rebooted just to be sure /Library/Preferences/com.apple.keyboardtype.plist I restored the defaults in the Keyboard Shortcuts. (Running Snow Leopard) Anyone know of what else I can do?