You know.. I'd mentioned once before that only the lower right corner of my space bar was seeming to be unresponsive but provided I hit it about 1cm in from the right edge it was OK.. since then I hadn't really noticed but it does seemed to have cured itself in time and I don't have to make any special concessions now.
However.. that isn't why I'm replying; what I have just noticed through doing some testing on 'this thread' in Firefox (& Ubuntu) with my space bar, is that it's putting the browser in/out of fullscreen kiosk mode
I potentially now have TOO MANY keys to put this thing in fullscreen mode.. Windows key does non-kiosk fullscreen (retains menu and toolbars), AltGr does full kiosk, my ` key (back tick quote) is doing it, and now spacebar too!
Most of them full foul once inside a textbox, because they're used for typing characters or window management, so I'm down to only using AltGr in those situations, but being able to use the spacebar for convenience at times is an unexpected bonus.