[kastorff]

Originally Posted by Lizard

The graphics cards and OS have changed, not OmniFocus. So we need to make changes to be more cooperative with Mavericks' assumptions and behaviors.

Way better answer than the earlier one I responded to. :)

But OF did change. A Mavericks compatible version was released. On two machines, one with new hardware, one without, OF behavior changed. The common factors were Mavericks and OF. Not completely off base to assume someone testing OF under Mavericks would have noticed the graphics card change. If it's not part of the quality control process, it probably should be.