BUT
never forget IE and Firefox does not show your pages the same.
It is a shame that there still has to be differences in browsers.

Heck, there are differences in monitors or maybe the OS?? set at the same resolution.
The problem I had was a div clear left, and for most people, the rest of the page was fine.
For others, the next div showed below the first div, rather than to the right of it, because the width was 10 px larger than the screen.

Anyway, hacks should not be needed for pages to look the same in all browsers/resolutions.