Jokersax has a CDMA fix .zip on his website. I had the same problem, but found the .zip and flashed it following flashing 0.5.1 and all was well. I have not had any problems since.
sometimes you also have to flash the 0.3.1 beta (which is in the cm9/miui fixes thread) when flashing new. I just flashed my f-in-law's new photon and it worked great.