I just looked on your page with IE6 and the pricing thing on the main page works fine.
I also clicked "View", "Character Encoding", and tried a few different ones.
My default happens to be UTF-8.
I couldn't find any common sets that caused the failure you are showing.
So, not sure what might cause it, as I can't get it to fail.
Is it the pricing thing on your main page that is failing with IE6 and IE7?