I have installed this plugin and when I try to activate it I get these messages:
Notice: register_uninstall_hook was called incorrectly. Only a static class method or function can be used in an uninstall hook. Please see Debugging in WordPress for more information. (This message was added in version 3.1.) in /homepages/45/d466164187/htdocs/midominio/www/wp-includes/functions.php on line 3041
Notice: has_cap was called with an argument that is deprecated since version 2.0! The use of user levels by plugins and themes is deprecated. Use the profiles and capabilities instead. in / homepages/45/d466164187/htdocs/midominio/www/wp-includes/functions.php on line 2998
The plugin has caused an 479 characters unexpected output during activation. If you see messages from "headers already sent", problems with syndication feeds or other issues, try deactivating and deleting the plugin.
I am using the 3.6.1 spanish version of WordPress, installed on a 1 & 1 hosting with JetPack plugin by WordPress.org activated.