Emulator

Game Name?
Smash Bros Brawl, Resident Evil 4 Wii, Custom Robo, Eternal Darkness, Mega Man X Command Mission, F-Zero GX, Geist, NHL Hitz Pro, Ocarina of Time Master Quest, Skies of Arcadia, Robotech Battlecry, Timesplitters 2, Timesplitters 3, probably loads of others. The only games I have that do not suffer from this are Mario Galaxy 2, Wind Waker, Xenoblade, Star Fox Adventures and Spider-Man 2. All of my games are NTSC.

Game ID?
I'll just say RSBE01 for Brawl, since the game's been working for so long and it's the most common game to own out of those. It doesn't seem worthwhile to find every game ID I've got and the problem doesn't vary between them.

What's the problem? Describe what went wrong in few words.
Whenever the game is STARTED (with OpenGL backend) with any Post-Processing effect (default set; this has nothing to do with the recent issue about other shaders and parameters) already enabled, the render window just starts up gray, locks up, and then a message pops up about Dolphin.exe having stopped working. After game startup WITHOUT post-processing, it can be enabled and everything works correctly from that point.

What did you expect to happen instead?
Normal startup but with post-processing.

What steps will reproduce the problem?

1. Open Dolphin and switch to OpenGL graphics backend.
2. Turn on any Post-Processing Effect in the Enhancements tab, anything from bad_bloom to auto_toon to FXAA to a color adjustment shader, doesn't matter.
3. Start any of the listed games.

Which versions of Dolphin did you test on?
4.0-2595 (current), 4.0-2301, 4.0-1306, 4.0-513, 3.5-1679

Does using an older version of Dolphin solve your issue? If yes, which
versions of Dolphin used to work?
It works on 3.5-1679, which I just happened to have. It's not a specific last-working point; the issue begins somewhere between 3.5-1679 and 4.0-513.

What are your PC specifications? (including, but not limited to: Operating
System, CPU and GPU)
-Windows 7 64 bit
-Core i5-3570k
-GeForce GTX 660 Ti

Is there any other relevant information? (e.g. logs, screenshots,
configuration files)
-It happens 100% of the time for the games listed.
-I suspect this is graphics card specific since I'd probably have heard this by now if it were universal.
-The post-processing effect can be enabled without issue afterward; this is just a very odd thing that is just inconvenient to work around.