One savvy and detailed advertiser noticed a bug with the new keyword planner tool that happens with using the broad match modifier. It seems the estimates simply do not work when a broad match modifier is placed into the tool.
Adrian B. an AdWords consultant from Romania, shared the issue. Notice the difference in the estimates:
You see the values are way off between the screens?
Adrian asked, "But why is the Avg. CPC price higher than BMM in the previous screen when the previous print-screen shows normal behavior for avg cpc?"
Google's Juliana, an AdWords representative, confirmed this is a bug but gave no time for a fix. Juliana wrote:
I was able to verify this is a known technical issue we have identified with the keyword planner. Right now, we don't have an estimated resolution time; however, we are working on having this resolved.
Forum discussion at Google AdWords Help.