Random Key Press when Waking up

Hello,

I have a MacBook Air (second gen) running Lion. The laptop works fine, but when I wake it up from sleep (opening the lid and then pressing the power button) I have noticed a strange behaviour with the keyboard.

Basically as i type, the letter "h" seems to randomly appear on my text. So if I am typing "Yona" I will look at the screen and see "Yohnahh". I noticed I can fix that by hitting "h" a few times or simply restarting the computer.

You may think it is hardware related but:

* It only happens when the computer comes back from sleep
* It can be fixed hitting the key but then if I change to another windows (i.e.: from chrome to texteditor) it may happen again.

So any idea of what this could be?

Thanks so much,

Yona