This was an oversight on my part (I'm the developer over at FFTF). The form is updated now to happily take non-US zip codes as well as no zip code at all.
Sorry about that Jem, we didn't realize that non-US zip codes would break the form. I've updated it so that you can either not put in a zip code or use a non-US zip code, both should work.
Re: Fail
Sorry ColinCowpat! That was my mistake. The form is updated now to accept non-US zip codes.
Re:
Thanks for the tip :)
This was an oversight on my part (I'm the developer over at FFTF). The form is updated now to happily take non-US zip codes as well as no zip code at all.
Sorry about that!
Re: A great idea, but ...
Sorry about that Jem, we didn't realize that non-US zip codes would break the form. I've updated it so that you can either not put in a zip code or use a non-US zip code, both should work.
Thanks!