This is not the right place, but what a great post I can move this thread if someone comes up with a suggestion.
First: file.php is a php file that deals with legacy file systems (according to it's header). That is good news for you.
I suspect that from the link that the pictures should be in a moodledata folder #3. Humm, that could mean 2.1 created a legacy file system for you if the id of your course in the browser address window is id=3. Do you have such a folder in moodledata? If so try placing the fuenftel.jp there and see what happens.
I have not spent any time working with legacy files in 2.1. There is a site administration setting to turn them on and off. I have seen the icon for Legacy files in a few courses (see demo.moodle.net). If you see the legacy file icon in the settings block, did you look in it to see what was there?
Hope this helps a little bit. Back to my Moodle improvements Chris