Not exactly sure where this should go but this seems to be the most appropriate forum.

I've had a logo designed for me which was transparent so that my banner background could be seen through my logo on my site. The logo is fine in IE7 and FF, but there are issues with it in IE6 - rather than being transparent, it shows up as having a white background.

Can anyone help please?

Let me guess... it's a transparent PNG ???
If so, IE6 does not support transparent PNG's w/o a bit of scripting to force it.

Do a search for 'pngfix' or similar, you'll find resources for the scripts, there are a couple of them out there.