I have one site I have been working on that looks fine on Firefox but very bad on IE. I am still using the old appearance design and did insert my own CSS. The only reason I haven't upgraded to the new design studio is that it tells me the CSS I currently have on the site is not compatible and I just don't have the time to redesign the whole site.
Would appreciate any help with consistent appearance or CSS across these 2 browsers. IE areas most affected seems to change font and font size.