I have been through every step in the sticky post above and still I cannot upload an image to my blog. I get an "http error" message with the flash uploader and an "Error 500 - Internal server error" with the 'browser uploader'.
Some more information:
1. The image I am trying to upload is a color .jpg file, 1024 x 768 and 73KB in size
2. The file permissions of my upload directory are set to 777
3. I am using Firefox 3.0.1 with the latest Flash plugin
4. I have added the mod_security code to an .htaccess file in the root directory and wp_admin directory
This problem is also occurring in IE7.
Are there any definitive fixes for this issue yet as I have been searching for hours now.