Header Images move down in Firefox

[mlo0919]

I've looked everywhere and if I missed it; I apologize but I made my changes to the Shades of Purple template and I've added two ad image graphics in the header and they display ok in Internet Explorer but they bump down a few lines in Firefox? Any fix ideas? my site is http://69.89.25.186/~sarafina/shop/index.php?main_page=index (it's a temporary location until I can point the domain to the new and fully working site)

The last line of buttons will need to be moved all together; I didn't see that there were links underneath when I first placed them there.

Any help would be ENORMOUSLY appreciated!

[mlo0919]

I fixed it in Firefox but now the same images are too high in Internet Explorer; how do I get them to work in both?

I've spent way too many hours on this. Thanks.