>Check the element style in the browser.
>FWIW the link style for th has 'text-align' set to '-internal-center' by the user agent stylesheet in Chrome.

I fixed it directly in cshtml, e.g.

<th colspan="{{wm.columns.length}}"  style="text-align:center">
                    {{wm.columnAttribute}}
                </th>

Looks OK now. I can now concentrate on the logic portion of this directive :)