I had just about given up on my $2.00/50 box Remington rebate for the Nitro's I bought early in the summer....low and behold check came in the mail yesterday.
Talking with my buddy that works at local gun shop that is a Remington Service Center. He says they have over 60 870 receivers that have been replaced versus repaired by Remington. I believe the problem is related to the ejector spring.

Dodging lions and wasting time.....