[Ubuntu 14.04 64bits, ROS Indigo Desktop Full binary, OpenCV 2.4.9 source, 2014retina MacBook Pro 15"]

I just installed OpenCV 2.4.9 from source, and now I can't use imageview. I'm getting the following message printed over and over:

QMetaMethod::invoke: Unable to invoke methods with return values in queued connections

Have I installed an incompatible version of OpenCV? Any advice on how to fix this?

Cheers, Nap

(Let me know if I need to post more info.)