Couple of things to look at
- Top menu and left menu are a mess in IE6...are you using transparent images there perchance?
- A couple of images in the content are WAY bigger (filesize) than they should be for the quality - try resaving with higher compression. The second one down is code-resized? It still has the original filesize but the quality looks bad, I'd manually resize then re-link it. The site loads quite slowly because of this.
- the blue flame icons (I think thats what they are) don't work in IE6 - transparencies again!
- I'd consider changing the blog layout to single column, the mainbody is too narrow for a 2-column layout IMO (last article is really squished from that one next to it with the wide photo).
Header art is awesome!
HTH
Dan