As with the other thread, I'm not sure why this wouldn't work. If you had a URL, I'd take a look at it.
With the new templates, there's also new zentable classes that look pretty nice (the same colors as the different zenboxes). On those, you'd just add class="zentable cool" to your table tag and voila!
Without looking at the site, my guess is that maybe your WDN templatedependent files are out-of-date.