I have not see any such reports until now.
FAH is designed to process under the username fahclient and to create files in a specific place so ownership of those files is consistent with that use -- and root privileges have NOT been required. In the past, OpenCL has been installed with the NVidia or ATI drivers and special permission has NOT been required to access an OpenCL device. Apparently something you've done has changed those assumptions but I don;t understand what that might be.
The first time you ran FAH, you might have been running as root or as fahclient so fhen the files were initially created, they may belong to root or to fahclient. If those files were created by root, they you'll have to either recreate them belonging to fahclient. Otherwise you'll have to keep using root. If special permission is now required to access the OpenCL device, you'll have to help figure out what to do about that.