I thought xHTML meant that everything was cross-compatible? Maybe I'm wrong, since I'm no coder...but if I paid someone to do xHTML/CSS I would expect that it was valid and working in ALL browsers.

End of story. It isn't about the amount that he paid you, it's about how you treat your clients, and obviously you do not treat your clients with the benefit of the doubt, or the respect they deserve.

I'll be staying away from you. Thanks for the warning.