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In particular there is an element called "reportOverviewControlForm." Obviously this controls the reports somehow. What you can do is to right click that line and choose "Add Attribute." In the box, type "GO" (in capital letters) then press enter.
After you add the GO attribute, close the source page and then refresh your Reports. If there is no change in your statistics, then that means there is nothing new to report.
So it looks like the real the "secret" to maintaining sanity with AdSense is to go do something else for a couple hours whenever your stats get stuck.