Heads up, Windows and OpenOffice users!
In OpenOffice 2.x or earlier, CTRL-Space inserted a nonbreaking space in texts (cannot be used in the spreadsheet program, Calc). In OpenOffice 3.x that shortcut was changed to CTRL-Shift-Space but the documentation for 3.x still shows the original command.
I've just spent 2 h of playing with my keyboard language selection and searching the web for this information. Hopefully I can save you some time by posting this information here since the nonbreaking space is a character appropriate to the SI.
As far as I know, M$ Office (on Windows) still uses CTRL-Space and Macs use Command-Space to do the same thing in their various programs.
Jim -- James R. Frysinger 632 Stony Point Mountain Road Doyle, TN 38559-3030 (C) 931.212.0267 (H) 931.657.3107 (F) 931.657.3108
