Googler, Jonathan Simon announced in the Google Webmaster Help forums that the +1 metrics section in Google Webmaster Tools may have issues over the next several days.

He said Google is working on “housekeeping” tasks for that section of Google Webmaster Tools, which implies to me that Google is doing some sort of upgrade in that area.

Jonathan said:

Here is a picture of how the +1 metrics may look for some:

Any guesses as to how major of an update we can expect? Any ideas or wish list items for this section?

We know Google is pouring a ton of resources into the Google+ and +1 products, so honestly, it can be anything. Plus we know it is SMX this week, so maybe an announcement is expected there?

Forum discussion at Google Webmaster Help.