Blur example from /tutorials/shader/ broken

Hello,

This is what I see when I run the code in /tutorials/shader/09_gaussianBlurFilter:

It looks like the blue channel of the image is in the correct position, but otherwise I have no idea what’s going on. This shader worked as expected before I upgraded to OSX 10.10 Yosemite. Can anyone reproduce this bug? I’m running oF 0.8.4 by the way. Let me know if I can provide more information.

miles