I just noticed, after a couple of weeks using my preproduction Controller that the backlights on the buttons are inconsistant.

The four around the wheel, + -> -< and home always light, but the << and || on the bottom row don't seem to ever light.
(I can't claim to have noticed all the time, but its fairly consistant now)

On my early beta Controller, the key lights were consitently lit.

Is there a test to see if this is a hardware or firmware issue? perhaps a bit of a faulty unit?

Thanks
Pat