We’ve run into another error with the latest Wordpress, version 2.5. This one occurs when trying to upload new images to a post using the new media features. The error “Specified file failed upload test” is displayed after clicking upload.

Hopefully the Wordpress developers will release an official fix for this, but here is what worked for us after we researched a few forum posts.

1. Add the code outlined in our previous post to your .htaccess file in the website root directory.

2. Make the corrections to 2 source code files as outlined at http://trac.wordpress.org/changeset/7573.

3. Make sure the image upload directory is set correctly in your Settings -> Miscellanous section and chmod the directory permissions to at least 755.

4. Clear your browser cache and try again.

This worked successfully for us. If anyone has different results or alternative solutions, please comment.