I am still learning html and CSS. I haven't used manuals or tutorials nearly at all. I have learnt most from looking on websites. Well, dreamweaver pops up the right syntax but I know what everyone does and I could do it without Dreamweaver.
And btw, this is my first site that works in both FF and IE!
I think you need to fix up the navigation image buttons.
To save bandwidth you could do mouse rollovers on the navigation links, having the background as black and text as yellow and when moused over invert those so the text is black and the <td> background is yellow.