Aaaargh damn it!
Doubletap on the home button isn't for the iPod anymore

I loved that feature. Didn't matter what app I was using if I needed to change tracks I'd doubletap.
Nevermind says I.... I'll just go re-assign the doubletap in settings and........
Nooooope. I looked everywhere in settings, doubletap is no longer configurable.
EDIT:
oops, nevermind... found it.. clever girls and boys at Apple