We'll be performing system maintenance on the AdWords reporting infrastructure on Thurs., Sept. 1, from 12 p.m. to 6:30 p.m. (PDT). During this time, any reports pulled from the Report Service will not be up-to-date. Shortly after the system maintenance, all reports will return to normal and will include data from the maintenance period. We apologize for this inconvenience.
--Patrick Chanezon, AdWords API evangelist