Unless I'm missing something...I'm stuck at Share Diff 4. Even though I've changed it to '16' (the old value was '4'). If I log in from a new browser the 'Account Page' does, indeed, say '16' for the worker I'm using.
((Not a big deal, but now that I have a BFL ASIC, I would like to up the Share Diff a bit to see if I can reduce the number of rejected))
Though it is odd that a previously unused worker does correctly update the Share Diff reported by CGminer...hmm, maybe you need to wait a bit after changing the Share Diff, and of closing CGminer, before the new setting takes affect?
BAJ 0: max 54C 3.88V | 8.228G/8.143Gh/s | A:460 R:108 HW:36 WU:111.8/m