Reported by Simon Sapin
The spec fails to say how to determine the width of an absolutely positioned table.
Simon Sapin notes that there are two different algorithms that could potentially apply:
10.3.7 Absolutely positioned, non-replaced elements
17.5.2 Table width algorithms: the 'table-layout' property (and
and he suggests that a reasonable way to resolve the conflict is to combine them by taking the used width (the result) from 10.3.7 and pretending that it is the computed width (one of the "input") for the purpose of 17.5.2, and then keep *that* used value.