I just integrated the oekaki function in the board and everything seems to work fine.
Problem is, the png-file the applet generates seems to contain crap and can't be displayed.
This looks like a configuration problem, because Shi Painter works fine in other boards.
Any clues how i can fix this?

And how can i set the image format to jpg?
I tried using these parameters in oekaki_style.pl:
<param name="image_jpeg" value="true">
<param name="compress_level" value="20">
but he still uses png.

Been a while since I looked at the code, but it may be that one of the scripts assumes the file is a PNG and names it accordingly. Try editing it to change the .png to .jpg and see if that helps.

Okay, i changed the filetype in getpic.pl and finish.pl. It's a jpg-file now, but the problem is still there.
And the file is 0 bytes big.

Hmm. Sound odd. What happens if you delete the file and try again?

If i delete it and paint a new pic, it just generates the same weird 0 byte file again.

Is your web server set up to block content is POST requests or something? Have you tried any other oekaki scripts? I really have no idea what's going on there...

Uhm.. What does Time: HAXORED mean? I am so curious and I am very dumb to find the right place to ask this question.

It's what gets put in for excessively long, or negative, times. If it's happening without you playing around, something's broken.

Is it possible to use shii painter with Kareha?

No, not at the moment. It would probably be possible to hack up the scripts Wakaba uses for oekaki to work with Kareha one way or the other, but I haven't tried.