Yes
i have same problem with Rejected shares
my is 5% to 10%
Please fixed
As written earlier in the thread. The rejected shares occur mainly with a low difficulty. A round-trip on the GPU takes 1-2 seconds. If in the time the job has changed the calculated solution is submitted but then rejected by the pool because they are outdated.
Next version will distinguish between outdated nonces and technical invalid nonces (probably 0).
Best solution is to mine on a pool with higher difficulty to only go for the big ones.