I can also confirm that it worked on -11 and not -12 for amd_64 and following config.
$ sudo lspci -vnnn 00:14.2 Audio device [0403]: ATI Technologies Inc SBx00 Azalia [1002:4383] Subsystem: Hewlett-Packard Company Unknown device [103c:30c2] Flags: bus master, slow devsel, latency 64, IRQ 10 Memory at 88000000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2
I can also confirm that it worked on -11 and not -12 for amd_64 and following config.
$ sudo lspci -vnnn
00:14.2 Audio device [0403]: ATI Technologies Inc SBx00 Azalia [1002:4383]
Subsystem: Hewlett-Packard Company Unknown device [103c:30c2]
Flags: bus master, slow devsel, latency 64, IRQ 10
Memory at 88000000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2