Flash messages appear to always output the green bar and checkbox, regardless of the status that is set. Granted, it's a small css and template change, but, the current settings are a bit confusing when you use flash to present an error and are presented with a green checkmark and a green bar which usually signifies an 'ok' response.
While I've not uploaded any graphics, the following diff's at least give some basic functionality to the flash message by supporting status_ok, status_warning and status_alert and should guide someone a little further in making template and css changes. Changes are to the .css file and master.html. Diff's attached.
