Not sure if it was intentional or not, but the "magic" div needs its id in quotes (same with your other post so I'm guessing that this is accurate).
Also, Redbox inserts a div into your page and copies the results of rendering the named action (remote_redbox) into that div. As such, you do not need the :update parameter. An example of my use:
<%= link_to_remote_redbox h(activity.name), :url=>edit_activity_path(activity), :method=>:get - %>
The :method=>:get was necessary because I'm using RESTful controllers.
