Sorry guys I'll look into fixing this. I guess speed kills.
Please flash back to version 1.1.
EDIT: I uploaded a new v1.2; seems to fix the wifi issue. Need people to test for stability. This may be a battery killer (since I had to increase the 1.3GHz voltage to 1.475V) so operate at 1.0MHz when possible. I will try to do another build in which I can try to undervolt it and still be able to operate at a high frequency, hopefully preventing us from draining the battery too quickly.
Sprint Samsung Galaxy S3 - FreeGS3 ROM