I recently upgraded to CS5.5 (7.5.3) and it seems that the shortcut for temporarily selecting the hand tool doesn't work any more. It used to be Alt+Spacebar in both text and standard mode. Now I can only get it working in text mode. For some reason Indesign won't let me set it to Alt+Space in standard. Any ideas?
It should be working the same as before (and when not in text mode, spacebar alone should also work). Check to be sure you aren't using some custom or oddball set of keybaord shortcuts (Edit > Keyboard Shortcuts...), and maybe try trashing the prefs (see Replace Your Preferences).