I use style sheets on my layout, but in Firefox, the style won't show. I've used it for ages in IE, but it just doesn't work in Firefox. Am I doing something wrong? I know that if I set the style directly into the input code or textarea, it works, but it's a little work to change this while changing layouts. Any ideas?

Mind posting your code and/or a link to your page?
(Also, is it an external stylesheet? If so, make sure the <style> tags aren't in there.)

For example this: http://www.waddledee.net/qbee/

I'm using an include, and it works in IE, but not Firefox.

inside your STYLE area, take out all of these...

<!--

and

-->

as you have extras and none of them are needed anyways.

But that doesn't really help with what I asked for :) (Thanks though)

both FF and IE looks extremely the same to me.
what exactly is not working??

Well, it's the forms. I've got styles on them, but it doesn't show in FF.

It shows up fine for me as well, dotted border around the input boxes.
Maybe try forcing the page to fully reload? (ctrl+F5)

in IE, your forms look like they are DASHED instead of DOTTED.

if you want a more similar look in both, perhaps change your css to DASHED and FF will accomodate.

border: #40273B 1px dashed;