I am working on a big form and it contains a lot of buttons all over the form, therefore I am trying to get working input[type=\"button\"] in my main css file so it would ca
They work for me in IE7 (both forms, with and without quotes).
Maybe there's another selector that is masking yours. You could try making your selector more specific in order to give it more priority, e.g.:
body form input[type="button"] { background: red; }