I upgraded to 3.5 last week and discovered that I could no longer upload files via the media uploader or from the post editor. I have tried many of the solutions suggested here, and I can't get any of them to work for me.
The site is hosted by GoDaddy.
When I try to upload a photo, either a message saying "HTTP Error" appears above the upload form, or the uploading progress bar turns into an error saying "IMG_NAME has failed to upload due to an error
Failed to write file to disk." Which error occurs seems to depend on the size of the image: Small files get the failed to upload, larger ones get the HTTP Error.
Using the browser uploader gives an "Internal Server Error" with any file.
What I Have Tried:
Deactivating all plugins and reverting to Twenty Twelve theme.
Doing a fresh install via FTP.
to the .htaccess file.
Setting permissions to 755 for wp-content and uploads.
Setting permissions to 777 for wp-content and uploads.
Increased the memory allocated using define('WP_MEMORY_LIMIT', '64M');
Set the temp dir using define( 'WP_TEMP_DIR' , ABSPATH . 'wp-content/' );
I pretty much did everything I could find that had to do with 3.5 media uploader problems, but nothing has worked.
I would really appreciate any suggestions or other help.