WordPress 3.5.1. issues

Hey There,

Good to see there’s a plugin now being adopted for history.js & wordpress. I’ve downloaded and tried to install on WordPress 3.5.1 however on activating i get the following message:

“The plugin generated 835 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.”

In addition there is no settinsg tab created for the plugin in the dashboard at all.

Any ideas on this?

Many thanks in advance

http://wordpress.org/extend/plugins/historyjs/