I get the error below when I try to automatically upgrade. Any ideas?
Downloading update from http://mu.wordpress.org/wordpress-mu-2.8.1.zip.
Unpacking the update.
Could not copy file: /home/melvinram/websites/wordpress-mu/wp-content/upgrade/wordpress-mu-2.8.1/wordpress-mu/wp-includes/js/codepress/engines/older.js
Installation Failed