I'm having a bit of a strange problem with the Media.GetMediaFactory method. When umbraco is hooked to our development database, it works fine and returns an UmbracoImageMediaFactory as expected, but when hooked to the staging database, it just returns null everytime with the exact same parameters. The only differences (seemingly) between the development database and the staging database is the content. I've tried looking through the database for clues, but have come up empty handed. Can anyone help?