It takes quite a lot to get me angry (stop sniggering at the back), but they've done it now.
Why is it that people who design web forms often make them so they can't cope with spaces in phone numbers? Real phone numbers have spaces in them. They do. So there.
What really winds me up is the error message. I type in a phone number. With a space, like it should have. And it goes to the trouble of telling me 'Phone numbers must be digits only with no spaces.' Why did you do that? If you wanted it without a space, why tell me? Why not just remove it? It's the most trivial thing in C or practically any other sensible programming language to remove spaces from a string of text. It's about a second's work. A lot less than putting in a prissy warning message.
Someone out there needs a radical working over with a heavy programming manual. Be warned programmers. Be warned.