When I view the Summary tab in my profile, it is showing +55 reputation points for this answer: http://superuser.com/a/590146

When I view the same answer in the Reputation tab in my profile, or if I view the actual answer, it is showing +75 reputation points for this answer.

I have refreshed my browser for the pages many times with no change. Is this just a case of the summary information not being updated as often as the other pages?

Here are some screenshots:

Summary Tab of profile page: