An Important Notice From Gmail

It's the first time I see an important notice in the mobile Gmail interface. Here's the message:

You may have been impacted by a recent issue in Gmail that inadvertently caused some actions (e.g. delete, report spam) taken while viewing a message to be applied to a different message. The issue occurred between January 15 and January 22 and is now fixed.

We encourage you to check your Trash and Spam folders before February 14, 2014 for any items you did not intend to delete or mark as spam and move them back to your inbox. We apologize for any inconvenience.

I couldn't find other references to this notice, so it's very likely that a very small percentage of Gmail users got it. It's interesting that the message is not displayed in the desktop Gmail, I only see it in the mobile Gmail interface.

Update. More information from Google:

"The issue affected users' actions only in Gmail for iOS, Gmail in a mobile browser, and Gmail Offline. The cause of the issue was a bug in a software update to Gmail on January 15. Once the issue was reported to the Gmail engineering team, they identified the root cause and issued a fix on January 21, and identified the users whose messages may have been incorrectly placed in Trash or Spam folders. The Gmail engineering team performed an internal review and is implementing a series of measures to address the source of the issue, improve early detection of these types of problems, and help prevent recurrence."

{ Thanks, Lukas Karlsson. }