I have had so many problems with CC (2014) since the 8.1 update. The latest problem is interacting with media in the project window. In any version of PP (7, 8.0.1, 8.1), when I attempt to drag media from the project window to the timeline i get the "Premiere Pro CC has encountered a serious error..." crash. I am running a Macbook Pro i7, 16gb of ram, Nvidia GT 750m graphics card, on OSX Yosemite. I have tried clearing the media cache and clearing settings on startup with alt+shift. I have been using 8.0.1 because of previous problems with serious ui lag on 8.1. I have had more problems with PP in the last 3 months, than in the previous 7 years I've used it.
After uninstalling the CUDA drivers on my machine, the problem went away for a few minutes, but have since returned.