I'm a mild deutranomolous person myself. No problems telling any light colors apart. Went up with different instructors, made them quiz me, had KRDG's tower shine me down the signal light, no issues either. Damn ishihara plates, well I get about 50% right. And as stated in this thread, I'm starting to memorize them. =) Anomalous trichromat's shouldn't be discriminated against like this. It's ridiculous. I'm with you all.
I'm thinking it's time to go get my IFR, Commercial, CFI, Multi. I've been putting it off because of this stupid minor setback (That shouldn't have been one in the first place.)
BTW, I believe that all types of color blindness can tell red from white, and yes, the 2 "color normal" pilots onboard that fedex plane saw the same thing as the "color deficient" pilot flying that leg, they were just balls tired, it has nothing to do with his deficiency. Such BS.