I can confirm this for Heads/Skulls as well. "/setblock ~ ~ ~ 144 1 destroy {SkullType:0}" will place a Skeleton Skull (and I can change the number to other heads no problem), but "/testforblock ~ ~ ~ 144 1 {SkullType:0}" gives "The block at x,y,z did not have the required NBT keys" like what was mentioned in the bug description.
Jacomere Eschelbrooke
I can confirm this for Heads/Skulls as well. "/setblock ~ ~ ~ 144 1 destroy {SkullType:0}" will place a Skeleton Skull (and I can change the number to other heads no problem), but "/testforblock ~ ~ ~ 144 1 {SkullType:0}" gives "The block at x,y,z did not have the required NBT keys" like what was mentioned in the bug description.