Nothing solid, but there are a few of us local SPS guys having Tissue loss on tips, STN and browning corals. So far the common thread is Reef Crystals.
Some SPS has shown very little affect, others have slowly been wiped out. LPS is not affected. The more water changes I did to try to remove what was in the tank causing the problem.....the issue with the coral has got much worse. This problem for me started when I moved to Reef Crystals, the issue just started off so small, I thought it was just a touchy coral in to much light.