What would you change about the Fair Use Doctrine to make it more fair?

A Web site called TinEye bills itself as a reverse image search engine. Given any image, TinEye can find out where it came from and how it is being used. TinEye even finds modified versions of the image. Click the link for example searches to see the results that TinEye can produce. Then, upload an image of your own (or use an image that you select from the Web) to see what TinEye finds. Take a screen-shot of your results. (Use the PrtSc or Print Screen key on a PC; use Command-Shift-3 on a Mac.)"