It appears that if you try to load the "top queries data" report under your advanced reports for "AdSense for search," the page simply won't load.
Pretty much every Google AdSense publisher is currently having this issue. The report simply comes back after a long time saying:
There were no queries from your site during this date range.
There are several people reporting this at WebmasterWorld.
Is it just me, or is anyone else having problems getting the Top Search Queries report on AdSense for Search to work? I'm getting around 500 searches per day these days, and whenever I try to run that report, be it for the month or just for the previous day, it either just hangs and hangs or else produces some kind of an error message. It used to work for me just fine before my traffic spiked, and now I'm wondering if I'm overloading it.
Forum discussion at WebmasterWorld.