Affects: IE5, IE5.5, IE6, IE7, IE8, IE9 PP4
Partially Fixed in: IE8 Partner Release 1
MSIE Feedback ID: 336685
Yet another issue with select lists in IE. First you couldn't style them (bug 291) then it turns out, you can't disable them either!
<option>I am valid</option>
<option>I am valid too</option>
<option disabled="disabled">I am NOT valid</option>
<option>I am also valid</option>
Try it for yourself, load this page up in IE and any other browser.
Update: IE8 partially fixed this in that you can disable options and thus they render grayed out and can't be selected by mouse - however they can still be selected by alphabetic key presses. (e.g. in the sample above, press "i" until you see that you've selected the disabled option)
Known Workarounds: None.
Related Issues: bug 291.