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.
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.