Great, HD7850 2.2MH/s

what is this ?

[15:12:55] Rejected f609b46e Diff 0.004/0.004 GPU 0  (Job '80f' not found)
[15:12:55] Rejected e62a9df4 Diff 0.004/0.004 GPU 0  (Job '80f' not found)

and more Job 'xxx' not found