Image support not automatically configured for Product Kits

I set up my site in the following order: Set up image support, run the auto-configure procedure for images, create some products. I then decided to enable the Product Kit module, and create some Product Kits. I discovered that I had to add the Image field to the Product Kit content type by hand (maybe that's another bug, and it should be done for you?) and added images.

However the image I had uploaded didn't display - either when viewing the detail of the Product Kit (blank), or when viewing the catalog section containing the PK (text "n/a" instead of the image).

The "Store Administation" homepage for my site gave me the cryptic advise to "make sure it is set as the Ubercart image in the content type settings under the Workflow fieldset." The Workflow fieldset for the Content Type settings for Product Kit didn't contain any such option, so I was stuck.

A bit more digging, and I discovered that I had to create an entry in the Variable database table with name = 'uc_image_product_kit' and value = 's:17:"field_image_cache"'. Ubercart had done this for me with the Product content type, but not for the Product Kit content type. There was nowhere in the UI to set that variable for me, and no documentation to tell me to venture into PHPMyAdmin and do it by hand. Querying the variable table with some intelligent guesses led me to the row for uc_image_product, and I guessed a corresponding row might be required.

I'm not sure what the correct behaviour should be, but the UI should do more for the site administrator than it does at present.