Tried and failed to update 1.0.3. Now 1.0.4 is available. I tried updating and it went further this time actually updating 6 apps, but when I go the OTA updates it still states that update 1.0.4 is available. Anyone at Droidbox know what's going on?
KOT49H.20160330 test-keys is the correct firmware. Ignore the notification about no updates, it will say this (as you're running the latest already) until a new update is released. Once that future update is released and installed, there'll be no "new" update available again until the next, and so on.