When using the content uploader, the message says:

One or more items may require external files.

Please check your AML settings, (which I have no idea what that means).

Blah Blah Blah.

Instead of showing 'One or more files', I would fire any programmer that decided not to show the list of files and prop names and decided to show this message instead.

Don't you think it might help the person uploading to solve the problem if you told them which files are the problem?

Please think this through from the users point of view that can't step through the code and figure out which files are missing.

Thank you for making this a top priority.