Graphical Corruption that was not present before maintenance

[SwissArmyKnife]

Further experimentation seems to point towards a problem with the game's FXAA implementation.... or lack thereof. To this point, in order to maximize framerate, I have been playing with the absolute minimum settings, however, fidding with the graphical settings in order to try and squeeze out a few extra FPS caused me to accidentally turn FXAA on.

As a result of turning FXAA on, the artifacts seen above disappear, and then stay gone when FXAA is turned back off.... however performing certain actions such as mounting up immediately cause the client to crash to desktop.

In short, FXAA must be toggled off, then on in order to make the artifacts go away, and must stay on to prevent further client instability.