In the Uploadify v2.0.3 Manual.pfd the second external script call in the example needs to be ended and closed. Not a big deal, but if you copy and paste those calls it can cause problems. Also, that same line has several smart quotes. I would change those.
Also, the last external js include in the documentation is incorrect, the file name is wrong.
Current: /path/to/jquery.uploadify.v.2.0.2.min.js
Should be: /path/to/jquery.uploadify.v2.0.3.min.js
And finally, in the available options section after the onCancel function the queueID option in the following functions (onError, onProgress, onComplete) is defined as follows:
queueID: The unique identifier of the file that was cancelled.