Adobe Premiere Pro CC 2014 - Black horizontal flickering lines during playback and finished render

I am fairly new to Premiere and have recently started using creative cloud on my new MacBook Pro retina - 2.3 GHz Intel Core i7 - 16GB Memory - OSX Version 10.9.4

I shot a music video using my friends camera and all the shots were absolutely fine, I dropped them into Premiere and started editing the video together.

Some of the clips are perfectly fine during playback, although sometimes my playback stutters a little, but some of the clips have strange horizontal lines that flash through them when I watch it back. I have only used basic things such as the highlight/shadow and sharpen tools in Premiere. I thought that it maybe fine once I exported the video but when I open up the exported file on my desktop in Quicktime the little black flashes/glitches are still there in some of the shots.

Here is a screenshot you can see a line halfway between the top of my head and the top of the screen, when you watch the video there are lots of these flashing about.

Could this be something that I have set up wrong?

CPU/GPU related?

Thanks,

Jordan