Forum Moderators: open
Have you played with the padding and border-collapse settings? Also, what have you got in these cells?
The recommended practice is to allow the user agent to handle the width and height of cells and the author should try not to disctate this.
Why not try a <div> based layout instead of using a table?
If you do a bit of work before posting and reduce your code to the minimum needed to reproduce the problem, it helps others zero in on the important issues more easily. And sometime, in trying to reduce things to their basics, you even see the issue reveal itself during that very exercise.
And when we're talking cross-browser issues, always validate before tackling a cross-browser problem, or you can spin in circles with something that cannot work. And validating means you need a DTD. The DTD also affects the way your code is rendered.
Validator URLs
W3C Validator - HTML [validator.w3.org]
W3C Validator - CSS [jigsaw.w3.org]