I've been scouring the internet to see why this problem is happening for days and can't find any info, so maybe someone here can help. I'm getting very close to launching our church's new website, but there's this annoying bug in Mac IE5 that I can't fix. For whatever reason, the blocks in the right sidebar don't have a background color, and the right sidebar is getting placed two far left which is causing it to be placed underneath the content section instead of to the right of it.

I've checked every other major browser (Firefox, Win IE, Netscape, Safari) and it works pefectly, but not Mac IE. I've validated my CSS with no errors. Any ideas on how to fix this? You can view the site here.