We have taken our Ripple and Stellar gateways offline pending further investigation of the "partial payments" vulnerability. We will bring the gateways back online as soon as possible, but not before we are absolutely certain that we aren't affected by this vulnerability.
If Kraken finds that it properly implemented the code to receive payments, and was not vulnerable, I hope that you will say so. This is much preferable to bringing Ripple and Stellar back online and not saying whether Kraken was safe to begin with or was fixed during the review.
Both Coinex and RippleFox have stated that they had properly accounted for partial payments in their deposit code, and were not at risk (RippleFox said that they were actually attacked, but their deposit code correctly examined the amount received, so their gateway implementation credited the attackers account with the funds actually received).