Martin Dougiamas

At the top of every page? Or just certain documents?

For my own curiosity, do you know why they want this? Are they unsure who they are?

dirroot and dataroot are not right ... they need to be absolute pathnames for the whole server. See the config.php here, for an example: http://moodle.org/mod/forum/discuss.php?d=484&parent=2024

Hmm ... this shouldn't happen! Are you sure all the files are there?

When does that error occur?

I'm not aware of any Korean efforts yet, but I'd love to see a Korean translation!

Is it possible to filter this list and to display only the images files?

Yes. See how it's done in mod/quiz/question.php - search in there for "mime". You'll see one "require_once" line up near the top, and later a small loop that creates an array called $images of only image files.