Thread:Project:Support desk/MW 1.21 Error creating thumbnail: Unable to save thumbnail to destination

Hi everyone.

I currently have a lot of trouble with the thumbnails in a new MediaWiki that I wanted to set up. I tried a lot, but nothing worked. I hope you can help me!

My Problems:
 * 1) Everytime I upload an Image, the thumbnail is not created and I get the error: "Error creating thumbnail: Unable to save thumbnail to destination". The Image itself is uploaded and can be viewed.
 * 2) When I delete an image and upload the same image again (after clicking on "Ignore warning and save file"), MediaWiki completely crashes and I get the php-error: "Fatal error: Call to a member function bind on a non-object in [...]/htdocs/wiki/includes/upload/UploadBase.php on line 259"

My Setup: All running on Linux with UNIX kernel-version 2.6.18-308.13.1.el5xen
 * MediaWiki 1.21.1 (German version)
 * PHP 5.3.3 (cgi-fcgi)
 * MySQL 5.0.95

What I already tried/tested:
 * I activated all php-functions that can execute shell-scripts.
 * I made sure ImageMagick (version 6.2.8) is working and accessible via php.
 * I tested deactivating ImageMagick and tried working with GD2.
 * I set chmod 777 to the images-folder and even once to the complete wiki.
 * I checked if I have access to /tmp.
 * I then came across old reports of the same problem with MW 1.19 like in: http://www.mediawiki.org/wiki/Thread:Project:Support_desk/Error_creating_thumbnail:_Unable_to_save_thumbnail_to_destination/reply I tried nearly every suggested solution to this problem. I even downloaded MW 1.19 (which did not work either) and tried the suggested solutions with this version.

BUT: Nothing worked. Nothing at all. I have no idea what else could be the problem. PLEASE have any suggestions for me! Thanks in advance.