Yeah - the "k" to cycle thru English/Metric/Etc for the speed bar works fine...it's the labels under the planes that don't show.
Going to try a re-install tonight & see if that fixes it.
The command you are looking for is 'Toggle Icon Types'. Make sure you haven't cycled it so that the plane icons are turned off.
Wow, thanks man - that was it. I'm a moron! Had I slowed down & used my brain for 2 seconds, it might have occurred to me to check for this command because I think I've accidentally hit it once before...but, as I mentioned, I'm a moron!
Thanks again - saved me an overly hasty re-install.