Actual username is shown instead of real name on the "Activity of user" page (when you click the time ago)

This is potentially related to this issue.

I have installed the latest dev version (May 18 2012) of Heartbeat on my site. I am using the Realname and Email Registration modules so users are able to log in with their e-mail address but display a "real name" instead as their account ID.

In my streams, Heartbeat properly outputs the realname for !username. However, when showing the streams in a block, if I click the time (for example, "1 week ago") it takes me to a page entitled "Activity of [user's e-mail address]"; this page uses the actual account name, not the realname. In my site's case these account names are e-mail addresses, so I have had to disable Heartbeat.