Terk, not sure what you did, but my miners suddenly flaked out and crashed. Spent the past 20 minutes getting them back up and going again. The rejects appear to be back to low again and I do appreciate your efforts on keeping things smooth, but damn that was not fun seeing them all just crash like that.

That had to be unrelated. What I did was only to restart the pool application when deploying a changed version. Miners usually should reconnect within a second.
Great to hear that everyone's rejects are back down now.
Well it might just be a coincidence but i went from 1.9% average to 6% reject rate over 2 hours. First time ever that i get more than 3.5%. I'll report back if it stays like that but i'm not too worried.