Who told me that I'm an idiot when I say that this might be a problem? Will he apologise?
It wasn't me and i don't remember such post from you, but it doesn't matter too much in this case:
All pools are using the same version 8.1 right now as there is just no other choice, so all of them get the same (similar) delay and all of them had increased chance for invalid blocks (reason for the global bad luck lately?), so it was not a problem for the Slush's pool only.