In the Excel (2007) Home menu (Alignment section), there is a button to Increase Indent and another one to Decrease Indent. Mousing over either reveals their hotkeys which are Ctrl+Alt+Tab and Ctrl+Alt+Shift+Tab respectively.
On my system, neither of those hotkeys works. Instead they both give the same result as pressing Alt+Tab (i.e. the small screen showing thumbnails of all open windows).
Is there some setting needed to enable those hotkeys or is it some glitch in my system -- or me?