Bump - I need to know this as well. Out of nowhere, the keyboard now uses the green symbols and I cant seem to turn it back to normal. Frustrating since I can now no longer type the "@" sign...
Sounds like the function key is locked on. I would imagine this would be for using the 10 key or something like that. I don't know, but I would try holding down the Fn button or Fn + Num Lock or Shift + Fn. Play around with it and see if any LED's or things turn on or off.
In 3 days, a completely turned off laptop discharges by 6%