8
OK, I think i got something.
The site is unable to resolve MIMEtype of ZIP and DOC files, but I managed to store a JPG and a GIF, so this is it.
The problem seems to be in function getMIME, file XRManager.php
Edit: I've tricked MIMEtype check so it's always true, just to make a try, and this still doesn't store DOC files. No error message, but no file either.
EDIT: The files is stored, but it doesn't appear when window refreshes. The file simply does not exist for the browser.