Build 6285 seem to be the latest build I can use where my games will run as expected. Granted I have not tried every build since then but builds 6294 and 6298 are causing problems with most of my games. Below are some examples.
Using default settings with DX11 plugin
AMD 965
ATI 5870
Super Mario Galaxy - Major speed hit (from 90% to 33%), black screen if starting a new game and reduced sound volume.
Umbrella Chronicles - black screen once able to play
Kirby's Epic Yarn - Not rendering correctly in some spots
Silent Hill - speed hit and looks grainy
Metroid: Other M - Solid black boxes on screen
Dead Space Extraction - Unplayable. Speed hit and red transparent boxes all over the screen.
Using default settings with DX11 plugin
AMD 965
ATI 5870
Super Mario Galaxy - Major speed hit (from 90% to 33%), black screen if starting a new game and reduced sound volume.
Umbrella Chronicles - black screen once able to play
Kirby's Epic Yarn - Not rendering correctly in some spots
Silent Hill - speed hit and looks grainy
Metroid: Other M - Solid black boxes on screen
Dead Space Extraction - Unplayable. Speed hit and red transparent boxes all over the screen.