Thanks. It's a browser-specific issue. Worked for me in Firefox.
Even with a good 'reset' CSS, a web designer deals with browser-specific issues. Lots of them for IE6, and CSS rounded corners, transparency, shadows, and @font-face are handled differently by IE and mozilla than other browsers.
I just didn't expect something as established as tables to be treated differently by different browsers.
That is an interesting observation. I would not have expected that, either.