At 511 DIF some of my cards don't have time to complete a share in between blocks.

VARDIFF ftw.
working on that...
luckily, with PPLNS, if you miss a block, it doesnt hurt you, because it takes previous shares into account.
Forgive my newbness in that regard, then. Thanks.
Getting almost double rejects in the last couple of hours, and diff is too high, what is the need to do that? the pool was running great
Hmm I'm getting zero.