It's a well known problem when the Preview application on a Mac is used to work with PDF forms. It corrupts them in a number of ways and should be absolutely avoided and Adobe Reader should be used instead. If you're coworker is not using Preview, can you tell us exactly what she is using?
My coworker has Windows 8 and uses Windows Reader to View PDF docs.
What happens is she uses Adobe Reader instead? I'd be very interested in looking at a sample document that behaves this way if you're free to email one to me: acroscript at gmail dot com
Hey George, I emailed you the pdf docs. One using Windows Reader and One using Adobe Reader. It does appear that the fillable pdf docs do not work very well with windows reader. Windows Reader makes the file size much bigger and doesn't let people who don't use windows view info put into the file unless you print the doc or click in each space to view whats written. It does appear that the drop down menus and check boxes work in both adobe reader and windows reader.