It really is also important that your pages are validated against the
latest W3C standards (that's XHTML1.1 and CSS2 I believe). A page is not
finished until you get no errors or warnings reported.
So many people complain about browser incompatabilities and then write
lousy non standard code.
You may not have many visits from, for example, a blind person using the
Lynx (text only) browser and a screen reader under Linux, but to them,
it's still important that your page works correctly.
Dean Hamack wrote:
> My HTML teacher once said "Don't make people guess, make your buttons look
> like buttons".