Hey everybody. We're having the exact same problem on our Unreality TV site. We use categories as part of our permalink setup, and when Publicize posts these to the Facebook page, it's dropping the category from the link. Here's the link to our Facebook page (the links that *do* work are from a separate WordPress install where permalinks are simply post_title).
https://www.facebook.com/unrealitytv
Obviously changing our permalink structurwe at this stage is not an option. Is it worth backtracking to an earlier version of Jetpack?
