Well i can confirm that there is random blur like Mkilbride said. Last night i tested all 3 graphic backends(DX9, DX11 and OpenGL, 2xIR) in Arena Season 2. The only blur there was when you are aiming with your crossbow. Tested with the following PC specs and Dolphin version:
CPU: AMD Phenom II 555 BE 3.2Ghz
GPU: Gigabyte Nvidia GTX460 768MB
RAM: 4GB
OS: Windows 7 Ultimate x64
Dolphin 3.5-302x64
CPU: AMD Phenom II 555 BE 3.2Ghz
GPU: Gigabyte Nvidia GTX460 768MB
RAM: 4GB
OS: Windows 7 Ultimate x64
Dolphin 3.5-302x64