No this is not fixed, the only way to fix it to interact with the proprietary driver properly is via an xorg.conf option and we don't have the means to add arbitrary xorg.conf options to have it fixed in the distro. Comment #18 "The system was enabled on Maverick, and did pass the brightness key test." must refer to it passing with the image it shipped with which did contain the xorg.conf option. The good news is that Alberto is looking into extending jockey so we can maintain a list of machines that need this workaround and add it to xorg.conf automatically so it works out of the box (W510, W520 were also affected).
No this is not fixed, the only way to fix it to interact with the proprietary driver properly is via an xorg.conf option and we don't have the means to add arbitrary xorg.conf options to have it fixed in the distro. Comment #18 "The system was enabled on Maverick, and did pass the brightness key test." must refer to it passing with the image it shipped with which did contain the xorg.conf option. The good news is that Alberto is looking into extending jockey so we can maintain a list of machines that need this workaround and add it to xorg.conf automatically so it works out of the box (W510, W520 were also affected).