>> Did you use the Release Editor browser within the image to submit it
>> or the web-site?  The in-image Release Editor browser is the way to
>> go.
>
> I used the Release Editor. When Hannes mentioned the problems he had
> loading it, I (attempted to) manually upload a fixed install script.

If, by "manually upload" you mean you used the web-site, please try
simply changing the script in the Release Editor browser in the image,
fill in all the fields, then click "Save" button.  That should work if
it doesn't please let me know.