I am not sure if this is the place to put this issue, but I am getting the following error in my local assets:precompile command. Here is the full trace:

$ rake assets:precompile --trace
** Invoke assets:precompile (first_time)
** Execute assets:precompile
rake aborted!
active_admin/nested_menu_arrow.gif isn't precompiled
(in /Users/mattbridges/Sites/frbc-dev/app/assets/stylesheets/active_admin.css.scss)

Tasks: TOP => assets:precompile
(See full trace by running task with --trace)

...and I get an entirely different error in Heroku's Cedar stack

Running: rake assets:precompile
rake aborted!
could not connect to server: Connection refused
Is the server running on host "127.0.0.1" and accepting
TCP/IP connections on port 5432?

   Tasks: TOP => environment
   (See full trace by running task with --trace)
   Precompiling assets failed, enabling runtime asset compilation
   Injecting rails31_enable_runtime_asset_compilation

I have no idea what is causing this error. I just ran this on a brand new, no-code-changes app, so no code of my own should be conflicting.