What ever case it maybe.. WASH your rice.. so that you can wash away all the dust..

The browning of the base in a rice cooker.. Refer any manual of a Rice Cooker.. Browing is very common on the base of a rice cooker.. As the base is what get very hot all the away.. so slight browing of the rice in a rice cooker is normal..

Washing rice is goodness.. strange but true..

IMI - The Screen Behind The Mirror
"I object to violence because when it appears to do good, the good is only temporary; the evil it does is permanent."

"The best way to destroy an enemy is to make him a friend."