diff --git a/doc/source/nodepool.rst b/doc/source/nodepool.rst
index dc0a2b4727..e4a6f83356 100644
--- a/doc/source/nodepool.rst
+++ b/doc/source/nodepool.rst
@@ -32,3 +32,40 @@ image with cached data for use by devstack.  Nodepool spins up new instances
 and tears down old as tests are queued up and completed, always maintaining a
 consistant number of available instances for tests up to the set limits of the
 CI infrastructure.
+
+Bad Images
+==========
+
+Since nodepool takes a while to build images, and generally only does
+it once per day, occasionally the images it produces may have
+significant behavior changes from the previous versions.  For
+instance, a provider's base image or operating system package may
+update, or some of the scripts or system configuration that we apply
+to the images may change.  If this occurs, it is easy to revert to the
+last good image.
+
+Nodepool periodically deletes old images, however, it never deletes
+the current or next most recent image in the ``ready`` state for any
+image-provider combination.  So if you find that the
+``devstack-precise`` images for a single or all providers are
+problematic, you can run::
+
+  $ sudo nodepool image-list
+
+  +--------+--------------------+------------------------+----------------------------------------------------------+------------+--------------------------------------+--------------------------------------+----------+-------------+
+  | ID     | Provider           | Image                  | Hostname                                                 | Version    | Image ID                             | Server ID                            | State    | Age (hours) |
+  +--------+--------------------+------------------------+----------------------------------------------------------+------------+--------------------------------------+--------------------------------------+----------+-------------+
+  | 168655 | hpcloud-az2        | devstack-precise       | devstack-precise-1394417686.template.openstack.org       | 1394417686 | 387612                               | 4909797                              | ready    | 26.83       |
+  | 168696 | hpcloud-az2        | devstack-precise       | devstack-precise-1394514268.template.openstack.org       | 1394514268 | 388782                               | 4930213                              | ready    | 0.75        |
+  +--------+--------------------+------------------------+----------------------------------------------------------+------------+--------------------------------------+--------------------------------------+----------+-------------+
+
+Image 168655 is the previous image and 168696 is the current image
+(they are both marked as ``ready`` and the current image is simply the
+image with the shortest age.  Delete the problematic image with::
+
+  $ sudo nodepool delete-image 168696
+
+Then the previous image, 168655, will become the current image and
+nodepool will use it when creating new nodes.  When nodepool next
+creates an image, it will still retain 168655 since it will still be
+considered the next-most-recent image.