Remove link outlines
You know those dotted outlines that Firefox puts on links, often breaking the aesthetics of image links?
a { outline:0; }
Graceful degradation of submit
Instead of using type="image", use a normal type="submit" and apply the image with css background. To get rid of the text, use a negative text-indent on rational browsers or a combination of display:block, overflow:hidden and font-size:1000em (better than font-size:0, trust me).
Go ahead, disable CSS and see for yourself.
Oh yeah crap: doesn't work in Camino.
