The CSS property 'text-align' does not allow for a value of 'auto'. See
Linie 96 in TAO's drupal.css reads:
thead th { text-align:auto; }
Maybe this is some kind of hack? It is ignored in tested browsers though.


Follow up: I tested the behavior and center or inherit is the value we want here. Since the current value is invalid this is what we actually get right now.