Forum Moderators: open
W3C Validator - HTML [validator.w3.org]
W3C Validator - CSS [jigsaw.w3.org]
So she has to scroll down to see my web page, but all of the navigation is still at the side.
Once validated, I will bet you have something "clearing" the main content or the funky way IE manages the box model causes it to not fit in your container in IE. Zeroing out/reducing margins/paddings wil probably fix it, but as suggested, validate it first.
Sensible browsers:
container---------------
nav-- content ----------
----- ------------------
Probable case in IE:
container---------------
nav--
-----
content ----------
------------------