Error message...

[charmarie]

Removed

[GeoS]

Check this:
http://forum.pixelpost.org/showpost.php?p=39535&postcount=7

[austriaka]

editing the function.php was not meant to solve your problem but to show you all error messages upcoming when uploading a picture.

The lines you pointed produce an error because there is no picture in database (division by zero)

I just tried http://charmarie.net/ but I get the folder overview of your site instead of the index.php. Index.php seems to be missing at all.
In folder images and in folder thumbnails I can see an image you uploaded yesterday evening, so I suppose it is working now?
What was the solution?

[GeoS]

Warning: Division by zero in /home/mypath/admin/images_edit.php on line 170

Warning: Division by zero in /home/mypath/admin/images_edit.php on line 172

1. Its only warning (code from line 170 and 172 inside /admin/image_edit.php).

Warning: Cannot modify header information - headers already sent by
(output started at /home/includes/functions.php:954) in /home/admin/index.php on line 150

2. It means that you have put somewhere space or return (i.e. inside some of admin script files or inside /includes/pixelpost.php or any other which you tried to edit).