Thanks for the reply! This makes sense.
I haven't explored the program completely but I found this line in flm.class.php
Code:
array('find', $this->workdir, '-mindepth
', '1', '-maxdepth', '1', '-printf', '%y\t%f\t%s\t%C@\t%#m\n')));
-printf isn't a valid argument in find on FreeBSD.