I'm running a Site / Keyword report from report center trying to see a list of keywords with zero impression.
I clearly stated the condition "Impressions" "Equal" 0, for a period of the last two months.
The resulting reports contain a list of keywords which none have zero impressions, it shows some with 1 impressions, but none with zero impressions. It seems like the system "cannot see" the keywords that have not triggered at least one impression.
Does it happen to you?