The information in this article applies to the following:CATALYST 4.2, 4.3, and 4.4 Display Drivers Upon making changes to certain monitor calibration software, the gamma settings will not be applied or loaded for the display. Color and gamma profiles for third party applications and games are also affected.

Users who are experiencing this issue are advised to download and install this driver HotFix.

Gamma Hotfix for Catalyst 4.2, 4.3, & 4.4

Thanks to Rage3D for the heads up!