When I go to my DNA screen, clicking on some people in Firefox 16.0.2 gives the error message "s.un is undefined" which seems to be a javascript error.
I was able to use IE 9 to see those people, however, now get an error message there also. The error message is "Unable to get value of the property 'toLowerCase': object is null or undefined."
I reported this to the Ancestry support folks and they didn't seem very interested.

Barbara