IE making cell gap where there shouldn't be one! Please help

[spindrift]

Hi guys,

I've made a template for a site and it renders perfectly in Firefox but not IE.

It's only a small difference. If you check out www.spindriftmedia.com/clients/jd/main.htm in IE, between the logo in the top left and the navigation, it shows a tiny dark blue horizontal strip of the column bg below. It's not there in Firefox and I've looked at my code but can't seem to get rid of it!

If anyone knows what might be causing this or even better, how I can fix it, I would be most grateful.

Thank you very much and I hope to hear from you.

All the best,

Mark