Can Time Machine users try these test builds?
http://www.mediafire.com/download/x1bvmqqyv8x4kmb/RT-AC68U_3.0.0.4_374.42_2.zip
http://www.mediafire.com/download/92lrw2wm50wrcah/RT-AC56U_3.0.0.4_374.42_2.zip
Part of the build changes to netatalk were reversed, which brought back support for sys extension attributes.
http://www.mediafire.com/download/x1bvmqqyv8x4kmb/RT-AC68U_3.0.0.4_374.42_2.zip
http://www.mediafire.com/download/92lrw2wm50wrcah/RT-AC56U_3.0.0.4_374.42_2.zip
Part of the build changes to netatalk were reversed, which brought back support for sys extension attributes.