Hi Bruce,
Please check following;
when you unplug ECU do you have gain, white balance and knee switch on camera on the same values like when using ECU?
Reason why I am asking is that when you have ECU connected it overwrites camera gain, white balance. When you unplug it camera goes to what switches on camera are set to. So that would explain problem with white color shift and exposure that you have.
When you have ECU connected you can not change ROP seeting with rotary menu button. You have all the other knobs for every ROP setting on ECU controller. ROP (remote operational panel) is special menu where you can see all values that you are changing with ECU in one convenient menu.
BTW I have few cameras here with newest upgrade and they work normally.
I hope it helps.
Mariusz Cichon
AbelCine Tech NY
888.223.1599
mariusz@abelcine.com