Hah. I looked at that word, then wrote it with a double s, looked at it again and it looked wrong, so I went back to one.

But now that I see it posted, the single s looks very wrong indeed.

D’oh.

Also, any post on the internet about someone else’s spelling mistakes will inevitably contain at least one spelling error itself, so I’m just maintaining the universal rules ;)

In your case, I suppose it’s “cuz”