Thanks for the feedback, gents. The system wasn't as smart as I originally thought it was.
Moo.... Our 400 manuals say that Flap Load Relief is only for Flaps 25 and 30. There is an Advisory message "}Flap Relief", but no warning related to Flap Load Relief. I believe the EICAS flap indicator will change to indicate that flap position disagrees with flap lever position (similar to the change when the reversers are deployed).
Cheers.
Q.
P.S. (Edit) I've just been told that the KLM AOM has this to say:
"OVERSPEED:
This alert is displayed when the airspeed exceeds Vmo/Vmmo
Reduce airspeed or adjust flap/gear position whichever is applicable"
Why would it tell you to adjust your flaps or gear if the warning was not dependent on configuration?