Wow what a coincidence!

My cat was sleeping next to my n900.
When he woke up he looked me straight in the eye, donned his spectacles and started talking about his thesis on antidisestablishment.

I'm totally blown away.

Now this may sound really "Out there" and maybe a bit far-fetched but have you considered the keyboard cable might be faulty (maybe check the connections too)?

(Should I even be suggesting this?)

As a precaution wear one of these: