Using a selector that is simply ":hover" doesn't match any elements.
Created attachment 15999 [details] test case Note that in Firefox this selector doesn't match the <p> elements, but does match the <input> and <button> elements.
(In reply to comment #0) > Using a selector that is simply ":hover" doesn't match any elements. (in quirks mode)
Comment on attachment 15999 [details] test case Windows IE 7 has the same behavior as Safari 3 beta on this test case: :hover doesn't match any elements.
Closing: that's the expected behavior in quirks mode https://quirks.spec.whatwg.org/#the-:active-and-:hover-quirk