I just put a set of DR nickel LoRiders on the Sterling 5 I just bought from bino (insanely great bass, btw). After playing for about 90 minutes I looked at my hands and... THE DREADED BLACKFINGER!! I remember back in my guitar playing days having my fingers turn black from crappy Fender nickel strings, but I've used these DR's before without this happening. I can't think of anything in my playing environment that's changed, nor in my body chemistry for that matter (that I know of, anyway). Anyone else ever had this experience? Has DR changed their nickel plating formulation? Just a bad set? I'm kinda bummed because these strings sound GREAT on this bass. But it took me like twenty minutes of scrubbing with a stiff brush to get the crud off of my fingers!