Node Gallery not using administration theme for its custom tabs I'm using a very minimal custom theme for the website, but Bartik for administration.

Node Gallery plugin adds tabs to the Edit Node page (e.g. node/46/edit): "Manage Items", "Sort items" and "Upload new items". When I click on them, the custom theme is used instead of Bartik. I suspect this is because these pages weren't properly flagged as admin pages, or something like that.

How can I make Node Gallery use administration theme for its custom tabs?
Generally, to declare a path as an admin path (and thus one that would open in the overlay/use the admin theme, etc.) you need to declare them using hook_admin_paths.

If this is the issue (I don't know Node Gallery, so I can't be more precise) the best would be to implement hook_admin_paths in the Node Gallery module and submit the patch on the Node Gallery issue queue.