milosevic - 9:34 am on Jan 5, 2011 (gmt 0)
Try changing your rules for the 'buynow' class to be on .noborder td
The padding you want to remove should be on the parent td, rather than the contained anchor or image.
It's good in addition to reset images to not use padding or margins for the whole site at the top of your css file with a rule like:
margin 0; padding 0;
Hope this helps!