I often have issues when trying to "merge" results into a person (see screenshot)
http://trees.ancestry.com/pt/MergeFamily2.aspx?ssrc=...

I see an error in my JavaScript console (see screenshot)
In the html source I see reference to an error page (not sure if that's always there and it's just shown/hidden when necessary).

This happens to me on a regular basis: Chrome (Mac), Safari(Mac), Firefox(Windows). Clearing cookies does nothing. To me this is an ancestry.com issue and wish it would be resolved as it has happened frequently over the last month.

Jim