I cannot get the main body of my avatar to appear. I've resorted to building a body with items that cover all of the skin areas, but that obviously isn't ideal. When I'm on the body tab and click "wear," nothing is added like it is with the nose and other features. I've cleared the cache and everything - no difference.

recommend posting in this Megathread: Broken avatar image, and/or wardrobe completely unusable

Read the opening post and do what best applies to your situation, but I think this is likely your issue:

Okay - I had read that and thought it meant the "broken image" icon was coming up. I'll try that out though - thanks!