21 Feb Ancestory.com support says:
"Thank you for contacting Ancestry.com in regard to the issue you are having with the Search Result Details box on Family Tree Maker not updating.
We are currently addressing the issue you are experiencing, and this will be corrected in the near future. Feedback from you, our valued customer, helps us correct errors and improve the website. Your patience and efforts to assist us in this matter are appreciated."
So, if you have not filed a problem report, please do so as it might increase the priority. Here is the problem description as I see it:
After I search in FTM 2012, and choose a census record from the results, the data shows up in the "Search result detail" panel ready to merge with one of my individuals (or not). If I then select one of the other individuals in the census record, or one of the suggested links in the right panel, the data in the "Search result detail" panel does not update to reflect the new individual or record.
This same problem cropped up last August and was corrected.