Troubleshooting "The GD library is missing or outdated"
Sometimes after installing a drupal site on a new server, or slicehost slice, you'll get a message in the Status Report pages, "The GD library is missing or outdated". If your sure the GD libraries are installed (most likely they are) make sure that you've turned them in in your php.ini file.
In most distros it can be found at /etc/php/php.ini or if your on shared hosting you may have a special one just for your account.
Do a search in the php.ini file and make sure that the extension is enabled.
extension=gd.so (enabled) vs ;extension=gd.so (disabled)