Error rendering large tables on many browsers

If you create a large table on a page, many browsers won't render correctly, despite of the Theme of the space.

Browsers:
Firefox 3.6.4: problems with documentation theme and with easy reader theme.
IE8: the table is shown on the bottom of the page, after the 'Profile Panel', which is not exactly a bug, but it's not a good way to show the table.

If you use FF with Easy Reader Theme, it renders fine. I think this is the right way to show the information.

I'm attaching screenshots and the markup for test.