On the URL, there is a map and a vertical zoom selector. The zoom control should be next to the map on the right. Instead, it appears below the map on the right. Layout in Firefox is correct. Regression: Don't know yet. The page hangs Safari 2.0.
Created attachment 29660 [details] Test case/reduction (well, it's not really a reduction, but a test case of one). It appears for display:table the 'width' property isn't the content width: the content width is 'width' - 'border-left'/'border-right' in this test case. Probably ought to check the entire box-model with an element which has display:table.
Padding appears to equally reduce the width.
Created attachment 30354 [details] A better test case that tests both padding and border. It also simplifies the pass condition.
This appears to have got fixed in the intervening years.