Quoted from PinJeff:

I am having the same problem with Dorothy light.
Blinks blue when capture is ready. When ball is captured the light is off.

Quoted from tiesmasc:

Code release states: Capture Dorothy light now blinks when ball will be locked and is solid when a ball is already locked and will kick out to upper playfield.
I read this as
* when a ball is not locked on the castle playfield already it will blink to indicate capture dorothy is available and the ball will be locked on the castle playfield once she is captured.
* when a ball is already locked on the castle playfield it will be solidly lit to indicate capture dorothy is available and when she is captured a ball will be released on the castle playfield (rather than served up at the shooter lane).
* the behavior after capturing dorothy remains the same... light becomes unlit