We're investigating - at this time, thanks a to a quick email from Max, there is NO FORK detected. I'll let him further confirm though.
Vic
No fork detected on this side. I checked several nodes running both the old and new version of the wallet/daemon and they are all in sync.
Quark has both hard-coded checkpoints and broadcast check-points to mitigate forks in the block-chain.
If anyone would like to double-check that they are on the correct chain:
getblockhash 716590
0000000002b691588888763201805d6dc9ba679f83df5c3e655f64d1a8457b0a