Thanks heres the url

http://www.uiowa.edu/~geog/environme...ironment.shtml

I do not now what the function of this declaration is, but please remove this
from the beginning your css and IE7 also shows bullets:

* {
margin: 0;
padding: 1;
}

The padding: 1; is definitely an error cause there should be at least
something like px behind the 1, so like padding: 1px;