We've just pushed a patch to steam to address the following issues:

- Fix Gamma/Brightness not properly being applied to the Bink videos.
- Fix streaming issue for high res textures.
- Fix key binding modifications not being applied when pressing escape key.
- Some tweaks to MSAA rendering.
- Comfort tweaks to mouse drag speed so in-game interactions are smoother.

Please be aware there are some other issues which we are working on, but wanted to get these fixes out to users as quickly as we can.

If users want to remain on the launch version they can select this from the Beta Tab on the game properties.. Just select "launch-version-20150130" and the game will revert back to the original launch build