I have three rigs that are producing nothing but client error on Rosetta. All three sucessfully completed all WUs until I installed a GTX660 in two cases and a GTX680 in one case. I moved the machine with the 680 to WCG and it completes WUs with a 100% success rate. In every case the machine finishes the WU. The Task for User page shows Over, Client Error, New. None of the machines are set to use the GPU. Anyone else experience this?