They haven’t made this fix extremely public. In order to find it you had to go to the downloads link and dig a little. Here it is for your convenience.

Jason Tallman

BRU Server 1.1.5 Authentication Fails under Tiger

Because of a change in the manner in which the authentication process
works in Tiger versus previous OS X releases, you will need to create a
file in the /etc directory to allow the Agent Control Tool to
authenticate properly. To do this, follow these steps:

Open a Terminal
sudo touch /etc/brutab

This is addressed in the pending 1.2.0 release.

The BRU Server Config Tool suffers from a different issue when starting
the server daemon. While you may use the Server Config Tool for all
other control operations, starting the daemon from the GUI will result
in the GUI hanging and the spinning beach ball of death appearing.
Until the pending 1.2.0 version ships, we recommend that you stop and
start the server daemon from the command line as outlined in the
Installation and Quickstart Guide.