Environment: 

  • 15" Macbook Pro with Retina
  • OSX 10.8
  • 24" LCD Monitor connected via HDMI cable (macbook is  closed so that the external monitor becomes the primary display - I think the Mac term for this is clamshell mode)
  • Outlook for Mac 2011 14.2.3 (120616)
  • Latest installed Update: 14.2.3
  • Outlook is connected to Exchange Server 2010

How to recreate the problem: 

  1. Open Outlook 
  2. Click on Calendar
  3. Select Day, Work, or Week as the view
  4. Appointments appear as expected
  5. Now Attempt to scroll up or down
  6. Expected Result: Calendar view scrolls properly and after stopping the scroll motion, everything is legible.
  7. Actual Result: Imagine using a brush and a can of paint to write a perfectly shaped word on a wall. Now before the paint drys, slam your hand on the word and smear it all around the screen. Kinda hard to read now isn't it? Yeah, that's what happens. I have a screenshot of the problem if that doesn't make sense. 

Not very useful workaround: 

Disconnecting the HDMI monitor and using the laptop without an external monitor resolves this problem. What's odd is that this problem just started a couple of days ago. 

Note that no other apps on the Mac experience this problem and all other features of Outlook are working properly. Scrolling in every other app works as expected. 

Any ideas on how to fix this one? It seems to be getting worse by the day.