Take a look beneath the surface

This could really be done much more simply. Guess how much markup there is in this little table? 13.7k. There are 17 rows and 9 columns in this thing. And did I mention all of the spacer GIFs?
There are way too many table cells and spacers in here. And all of the dotted borders are done with a background attribute on table cells, which won't validate.
• A nested table? What for?
• To make a bulleted list? You're kidding, right?
This could all be done with 8 table cells and 4 CSS rules. Seriously. 8 cells and 4 css rules, that's all it takes.
• Oh no, another table masquerading as a bulleted list.
• Just mark up your bulleted lists as bulleted lists and let CSS do the rest.
You need a rule for <table>, one for <td>, one for <ul> and one for <li>. That's it. Once you have those you're golden.
• That's better than using 8 more table cells to make a fake bulleted list, which ends up being much less accessible.
• Excellent! The last fake bullet.

The code that shows the table structure:

table { margin: 3px; padding: 2px; border: solid 2px blue }

td { padding: 2px; border-style: solid; border-width: 1px; border-color: gray gray silver silver }