Site stats not loading on one of my pages

Do you experience similar issues when trying to access your stats directly on WordPress.com?

If stats are only broken in your dashboard, could you let me know what you see when trying to load the Stats page? Do you receive an error message?

It might also be worth deactivating all other plugins, one at a time, to see if one of them conflicts with Jetpack.

Let me know if it helps.

Could you check for Javascript errors when viewing your Stats page? You can use your browser’s Javascript console to search for Javascript errors:
http://webmasters.stackexchange.com/questions/8525/how-to-open-the-javascript-console-in-different-browsers

Could you also try to use a different alert plugin, and see if you experience similar issues? The following plugin seems to propose features similar to your WP Message alert plugin:
http://wordpress.org/plugins/wp-alert/