The announcement was made on Friday through the Microsoft Office blog, and notifies users that automatic updates for SP2 will be temporarily suspended while the company investigates the cause of the problem.
From the post:
On April 12th, we released SP2 for Office for Mac 2011. The majority of our customers have been delighted with the improvements ? new features and performance. Unfortunately, a small percentage are experiencing some issues with the update, specifically related to the Outlook for Mac database.
Five days after initially releasing SP2, Microsoft posted a workaround and apology to users affected by the update.
The first workaround deals with those users who have yet to install the update, and calls for the rebuilding of Outlook's database. The second, more comprehensive fix deals with those who already installed the patch and involves a complicated procedure to restore the database to working condition from an existing backup.
Microsoft Outlook on Office 2011 for Mac. | Source: Microsoft
Office 2011 for Mac users can still download SP2 through Microsoft's website, though it is recommended that the workaround be implemented prior to installation.
The SP2 update brought many enhancements for OS X Lion users like full-screen display modes and performance improvements.