There is a serious flaw with how the unobtrusive library works. A user can't do the following api call because it just doesn't work.

I'm not the only one who has had problems with this....

$.validator.setDefaults({ onkeyup: false });
http://www.tigraine.at/2011/08/26/jquery-validate-and-microsofts-unobtrusive-validation-dont-play-well-together/

http://stackoverflow.com/questions/8022695/asp-net-mvc-3-jquery-validation-disable-unobtrusive-onkeyup

http://stackoverflow.com/questions/5487139/how-can-i-customize-the-unobtrusive-validation-in-asp-net-mvc-3-to-match-my-styl