Quick update on trying to get my Cache withdrawn from exchanges after the fork:
* Poloniex did the right thing and reissued my withdrawal on the correct chain.  
* Cryptsy I've chased for over a month, they're not returning my ~500 coins (just keep pointing to the transaction on the old chain)

Life lesson, Cryptsy and forks do not mix (seems to be a good excuse for them to steal coins with a plausible reason for not returning them), thankfully the loss is only a couple hundred bucks.

YMMV.

Cheers