A task I use multiple times a minute is to select command lines from my do-files and execute them.
The shortcut for this function in previous versions of Stata was Ctrl+Shift+Up/Down arrow. I used to use Stata 10 and now that I've upgraded to Stata 11, the keystroke sequence described in the previous sentence does nothing. I'm limited to Ctrl+Shift+Left/Right arrows, which is painstakingly slow.