Can't pinpoint the issue: I have two fieldsets with the exact same code for an image column in a grid. One allows to browse/upload/link while the other only allows to link.

      description:
        display: Description
        type: redactor
        image_dir: assets/img/
        width: 70%

Screen Shot 2014-09-23 at 7.08.25 PM.png

Screen Shot 2014-09-23 at 7.08.56 PM.png