A green vertical line should appear at exactly 400px, not at 200px.

This bug has been reported at connect's IE beta feedback as bug 348564.

Update: This bug has been FIXED in Internet Explorer 8 Partner pre-RC1 build 6001.18343 released on December 11th 2008. Otherwise, Internet Explorer 8 Partner pre-RC1 build 6001.18343 PASSES this specific and particular testcase.

Valid HTML 4.01! Valid CSS!