Is anyone arbitraging AMD and XLNX?

$Advanced Micro Devices (AMD.US)$ $Xilinx (XLNX.US)$ AMD and XLNX moved in different directions today.

Was this due to some news about the approval for their merger, or have the arbitrageurs simply given up on keeping them near the ratio in the offer (1.7234 shares AMD for one share XLNX)? They haven't been very near it anyway. XLNX at 208.17 is way below the 241.56 indicated price given an AMD price of 140.17.