Running .4 and using Zhash for the new BTG Fork and am getting a ton of rejected shares. I've tried with and without afterburner running so the OC isn't causing this
GPU0: 603 Sol/s GPU1: 385 Sol/s GPU2: 705 Sol/s
Total speed: 1693 Sol/s
INFO 07:51:15: GPU0 Rejected share 203ms [A:0, R:38]
INFO 07:51:16: GPU0 Rejected share 250ms [A:0, R:39]
INFO 07:51:18: GPU1 Rejected share 187ms [A:0, R:17]
INFO 07:51:24: GPU2 Rejected share 206ms [A:0, R:39]
INFO 07:51:26: GPU2 Rejected share 187ms [A:0, R:40]
INFO 07:51:26: GPU1 Rejected share 189ms [A:0, R:18]
INFO 07:51:29: GPU1 Rejected share 203ms [A:0, R:19]
INFO 07:51:31: GPU1 Rejected share 191ms [A:0, R:20]
INFO 07:51:34: GPU2 DevFee Accepted share
INFO 07:51:36: GPU2 DevFee Accepted share
Zhash config will get you rejected shares for BTG.
BTG has its own config. I had this same problem with Awesome miner. Awesome miner list BTG under Zhash algo which gives rejected shares. To fix in Awesome miner, I had to create my own BTG coin and put it under the Equilhash BTG algo.