Apple Studio Display 15-Inch LCD: AppleVision Error Under Mac OS 8.5.1

I have an Apple Studio Display (the 15-inch LCD version) and since I upgraded to Mac OS 8.5.1, I have been getting the following error: "AppleVision failed to load completely." This happens about one every three times I start the machine.
You need Apple Displays 1.7.x. which corrects this issue. This version of Apple Displays Software is available from Apple Software Updates sites.

This article can help you locate the software update mentioned here:
Published Date: Feb 18, 2012