Apple AirBook keyboard responding erratically

If a simple reboot of your Mac doesn’t fix things, see if the problem still happens in safe mode.  Safe mode will often correct weird software behavior by forcing the OS to clear caches, do disk repair and other self-maintenance and housekeeping and temporarily disables third-party mods.

How to use safe mode on your Mac - Apple Support 

Does the problem go away in Safe mode? 

You can exit safe mode by restarting your Mac normally, then reevaluate the problem.

GagnesM wrote:

Apple airbook keyboard responding erratic

Could you provide details about exactly what keys are not working as expected, etc.?