Recently when logging into the game I have found that the frame rate at the character select screen is capped at 50fps. If I enable Vsync it then corrects itself to 60fps. Disabling Vsync returns it to 50fps. Frame Limiter is set to Unlimited. I know this is not caused by the CPU/GPU because in game fps averages higher than 50 (55-75fps) and sometimes when logging in or returning to the character select screen the frame rate is the expected 60-63fps.
This has been noticed on a computer w/ AMD FX-8350 paired with Sapphire Radeon 7850 2GB. I have also seen this 50fps cap, though on much rarer occasion, on an Intel i5-3570k paired with XFX Radeon 7850 2GB.
Note: CPU/GPU/RAM are all running stock.