Did you install any icon packs on your DROID?Same concept as above: Click the folder once to open it. A popup box display its contents should appear.
On the top it should say "Folder" which is the current name. Press and hold on that and another box should appear allowing you to (1) Rename Folder (2) Icon: Pick from IconPack (3) Pick from Photo (4) Crop from Picture. Just touch any and pick your icon picture