Hi, i've just installed this great plugin but i get 500 error in the admin interface.
As regards the front-end, the Wysija widget disappears but i still see every page. After having deactivated Wysija, Anti-Malware started working (like a charm!)
I suppose that one plugin brokes the other one :S
However, this is really a good plugin and will keep this in my website (deativated, for the moment)!!