I had five accounts on ETH before the hard fork with various balances. Over the last few days, I've sent all the ether in all of those accounts to Kraken. When I was done with that, all of my ether was in a brand new account (that did not exist prior to the fork). I then created a new account on Mist, and sent it all back to a brand new, did-not-exist-before-fork account in Mist. Am I now totally safe from replay attacks?
Also--just a side note--when I transferred to Kraken, ETHC magically appeared in my kraken account. I immediately sold it to US dollars and the bought new ETH, so the whole process was a net gain for me (assuming ETHC doesn't skyrocket).