Its out downloading now.
if you are connecting your PS3 to your TV using an HDMI cable, and if your TV supports RGB full range, the picture quality may be improved when this option is set to Full. Some of you pointed out that the Full setting would sometimes revert back to Limited and 1.81 will address this issue. Please keep in mind that this setting is only effective when the PS3 is connected to a TV using an HDMI cable. You can download the update tomorrow from PlayStation.com or through your System Update option on the PS3 XMB.