Sivar,
Thanks for the <body> includes <head> advice. At one point I tried to fix some of those validation errors, but it makes my head hurt. I probably need to just sit down with a bottle of aspirin and a liter of vodka and fix those.
Regarding the width, I'd like the remaining 20% distributed evenly on either side, so that my page is centered. I don't want any content in that 20% aside from a slightly different background shade.
Root,
Changing the wrapper to 80% seems to screw up the margins of my sidebar, and the remaining space only appears on the right side. Again, I'm very new to (ahem) CSS, so all of this is daunting for me.
Thanks for the help so far, you people are good folk.