ANONYMOUS I don't think so!
No drag and drop... essential for utilities like this.
Prefix does not operate as you would expect it to. A prefix is just that, a prefix. For example, if I have a folder of files that I want to add "as" to the beginning of each filename (as in a folder full of applescripts) I should be able to put "as" in the prefix field and no numbers in the number fields to accomplish this but it insists on numbering things.
The background picture is a bit superfluous since you can't see it.
(Version 0.98)