puppet-dashboad fileviewer

[llowder]

I recently install dashboard (1.2.10) on my puppet master (2.7.19 on Ubuntu 10.04 LTS).

I setup the filebucket/viewer as per http://docs.puppetlabs.com/dashboard/manual/1.2/configuring.html#enabling-the-filebucket-viewer.

The md5sums are now clickable links, but when I click them I just get a screen that says "input/output error" and in the logs for dashboard I see:

Processing FilesController#show (for 172.16.36.71 at 2012-09-17 14:50:28) [GET]
  Parameters: {"action"=>"show", "controller"=>"files", "file"=>"86aaee758e9f530be2ba5cc7a3a7d147"}
Completed in 1ms (View: 0, DB: 0) | 500 Internal Server Error [http://XXXXXXXX/files/show?file=86aaee758e9f530be2ba5cc7a3a7d147]

My question is, how can I enable debug type logging for dashboard, and what, if any, additional steps are needed beyond the linked directions? (such as changes to auth.conf or perhaps permissions needed on directories in /var/lib/puppet etc).

Thank you.