Above there is a link with display:block inside a box. The link should get a gray background on hover. In IE8 build 18344 as soon as the link text is hovered the following message appears: "A problem displaying ... caused IE to refresh the webpage using compatibility View". (Moreover, when IE8 is still in IE8 default mode there is no effect hovering the area at the right of the link text, while it should respond to hover since the link has display block).