I'm on a clean install of OS X 10.9.4 from a reinstall on July 1st.
I had the CUDA driver installed, removed it before, behaved the same either way. I just reinstalled and it pulled down version 6.0.54, which apparently has shown up in the last few days.
Permissions were verified and they were all read-write, but for good measure, I went ahead and applied at the top-level the change just in case the read-write from now forward.
I have the Red Giant Universe plugins installed, I will remove them for the next few days. The behavior was happening months before installing Red Giant's plugins, which I just recently checked out.
Just repaired disk permissions and aside from an unrelated printer driver folder being incorrect, nothing else.
I also followed your other threads about signing out and back into the Creative Cloud app. As well as disabling automatic graphic switching -- which I've not tried for some reason (I had forgotten about that.) Obviously not ideal if I have to run in the high performing GPU always.
I'm off to do a reboot now and I'll test it over the weekend. Lots of editing to do, so I should see how things behave.
Thanks again for your help. I've got collections of crash logs going back to December if this doesn't solve it. Perhaps some of your engineers would find it helpful to squish this bug.
Thanks!
Matt