I'm currently getting a lot of stales. Known issue?
What are you calling 'a lot'? global rate for past ~day is around 3.5%, which is certainly higher than normal, but not ridiculously high.
I think it's likely due to the problem user my previous post describes.
Well, I'm using Smartcoin and it was failing over to a different pool due to stales/rejected being above 10%. I can't say for sure what the numbers were. I will try again.
Edit: Just mined for a little over 20 minutes and got this:
Grand Total : [1049.11 MHash/sec] [308 Accepted] [35 Rejected] [11.363% Rejected]
I had increased Multiclone's work pool queue yesterday to try to deal with the idles (which were caused by the problematic user). Unfortunate side effect of this seems to be increased stales. I put the work queue back where it was before. Give it a shot again, and things should be back to how they were before?