1 BUG ID: Bugzilla bug 6821 Fix for 5983 will not always update hover correctly.
3 To run manually, move your mouse over the black box. You should see a green box. If you see any other color, the test fails.
6 Hover color before test: rgb(255, 255, 0)
7 PASS window.getComputedStyle(document.getElementById('b'), null).backgroundColor is "rgb(0, 128, 0)"