The problem is recruitment consultancies. They take submitted cv's and may put their own headers on them before passing them on to employers. So a candidate may submit a nice pdf, but they may then be asked to supply the cv in word format.
yes. we know of this problem and are actively thinking of finding a solution. may be create a recruiter login which allows users to share resume with recruiters and they tailoring it to their needs. its a far fetched thought though.