Shiita Malus

I have a decent computer and improved graphics card, and have had this happen on a different computer as well, however it hasn't always been there for me, jus the last year and a half and it makes taking pictures a real hassle. http://www.flickr.com/photos/shiita/10981009065/ Is there a way I can fix this? Or is there a possibility this is just a client issue? Latest Client: Firestorm- Beta 4.5.1.38838 Computer: Windows 7 Home Premium, Alienware AURORA_R4 Processor: Intel(R) Core(TM) i7-3820 CPU @ 3.60GHz 3.60 GHz RAM: 8.00 GB Type: 64-bit OS Previously when I had a much lower performance computer about two years ago, I never had this issue with a DOF glitch. The glitch has also followed me through several client patches and updates.