i use a combination of ems and %'s (i barely know why i choose one over the other to be honest) to size fonts and widths of a div say etc. all's fine. in a thread just recently someone was talking about using ems for fonts but putting font-size:100% on body first. i've never done that. a site i'm doing at the moment i've just put font-size:100% on body right near the start/top of the css cascade for each page. it's made no difference so far as i can tell.
what's the point of font-size:100% on body?