The uploaded file could not be moved to … This is different then the others.

I am getting the infamous “The uploaded file could not be moved to (path to uploads goes here) “

I have added the following php function to the class-wp-upgrader.php to get the output that is getting generated.

print_r($_FILES);

//Handle a newly uploaded file, Else assume its already been uploaded
                if ( !empty($_FILES) ) {
                        $this->filename = wp_unique_filename( $uploads['basedir'], $this->filename );
                        $this->package = $uploads['basedir'] . '/' . $this->filename;
  here ----- >   print_r($_FILES);
                        // Move the file to the uploads dir
                        if ( false === @ move_uploaded_file( $_FILES[$form]['tmp_name'], $this->package) )
                        wp_die( sprintf( __('The uploaded file could not be moved to %s.' ), $uploads['path']));
                } else {
                        $this->package = $uploads['basedir'] . '/' . $this->filename;
                }

This is the output I get when uploading a new plugin (Install Plugin):

Array ( [pluginzip] => Array ( [name] => core-control.0.8.zip [type] => application/x-zip-compressed [tmp_name] => /tmp/phpTPbYjk [error] => 0 [size] => 167862 ) )

Installing Plugin from uploaded file: core-control.0.8.zip
Unpacking the package.
Installing the plugin.
Plugin Installed successfully.
Actions: Activate Plugin | Return to Plugins page
This is the output I get when uploading a new theme (Install Themes)

Array ( [themezip] => Array ( [name] => typebased.zip [type] => [tmp_name] => [error] => 1 [size] => 0 ) )

The uploaded file could not be moved to (path to uploads goes here) “

I am positive it is not a permissions issue since plugins and themes both use the uploads folder. The $_FILES array is not getting populated during the upload process. I think there is a bug?

-ricbax