Meta boxes missing from "edit page" page

This is really strange, but the meta boxes for things like excerpt, custom fields, and allow comments/pingback, are missing when I go to edit a page. They show up fine though when I edit a post.
I dug around and found out that those boxes are getting the “hide-if-js” class for some reason.
What could this be?? Is there some option I’m missing? I disabled my custom theme, and put on twenty ten, I also disabled all plugins but the behaviour continues. Why would posts have the meta boxes but pages not?