It's even worse. You're letting the standard be defined by a specific version of an implementation. It would impede progress for future versions of the same imp

It's even worse. You're letting the standard be defined by a specific version of an implementation. It would impede progress for future versions of the same implementation. For example today I just browsed my Internet provider's customer area. Their online invoicing page only works on Firefox and IE7, but not IE8, IE9, Opera and Chrome. Urgh.