Google apologized last night for a bug that deleted e-mails and contacts for about 40,000 Gmail users. All the data will be restored soon.
The technical difficulties were caused by a storage software update bug, which affected 0.02 percent of Gmail's 200 million users. When Google discovered the problem, the company immediately reverted to the old version.
The bug affected several backups as well, so Google has been restoring the data from offline tapes, which is a much longer process than transferring information from another data center.
Google Calendar also suffered from missing data last week.
UPDATE MARCH 3: Google reports: "The problem with Google Mail should be resolved. We apologize for the inconvenience and thank you for your patience and continued support. Gmail should be back to normal for the vast majority of people affected by this issue. If you are still experiencing an issue, please contact us at firstname.lastname@example.org."