Robert_Charlton - 5:47 am on Sep 25, 2012 (gmt 0)

You wouldn't assign raters to documents, you assign them to queries...

The question is when you assign them to anything that affects current results, and IMO there's quite a remove in this situation.

I frankly would not have even considered raters as a possible cause of this problem, but the OP chose to frame it that way, so I'm responding to the hypothetical issue raised.