Received today on Google Analytics Account:
Google Analytics experienced a data processing error from April 30th to May 5th. Almost all of the data has been recovered and is currently being reprocessed. The recovered data will be reflected in your reports within a few days. Please note that a small percentage of data, particularly in the area of e-commerce reporting, was not recoverable from those dates.
We sincerely apologize for this processing issue and are taking every precaution to prevent such disruptions from occurring again in the future. For more information, please read through our common questions.
The Google Analytics Team