Additionally, as someone who has read applications and made hiring decisions in the past, one of the things I really look for is that their Word document is formatted correctly if they put on their resume that they have Word skills. I don't mean to scare anyone by saying that, but in a job where you're working on files that others will have to edit and update later, really knowing Word matters. That means you know how to use style sheets, you know how to set your tabs (rather than hitting the space bar repeatedly to eyeball lining things up), you know to use the proper font rather than just hitting "bold" or "italic," etc.
See, for exactly this reason I am a strong, strong believer that you should only be sending your resume and cover letter as pdfs. Everyone has a different version of Word and formatting does not stay consistent, the most beautifully arranged resume could come out weirdly on someone else's Word version and then it makes you look sloppy. PDF all the way! In my field at least, everyone pdfs.