A small bug in the template system prints out (to the client) the Velocity macro name instead of calling it. In browseusers.vm at around line 77 one reads:

... <a href="$req.contextPath/display/~doubleUrlEncode($user.name)"> ...

while it should be

... <a href="$req.contextPath/display/~$!generalUtil.doubleUrlEncode($user.name)"> ...

Changing the line fixes the problem.