[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] zmore:
Incoming notification sets media volume to max

I haven't seen anyone else post about this yet, so I'm wondering if anyone else has noticed this weird volume bug (on the last two 4.2.2 nightlies only so far):

When listening to music (Play Music app) at a normal volume, an incoming notification alertsound bumps the volume up to 100% until you manually toggle the volume rocker.

I grabbed some logcat snippets of the problem happening:

V/GCMBroadcastReceiver( 4018): onReceive: com.google.android.c2dm.intent.RECEIVE
V/GCMBroadcastReceiver( 4018): GCM IntentService class: com.hbwares.wordfeud.service.GCMIntentService
V/GCMBaseIntentService( 4018): Acquiring wakelock
V/GCMBaseIntentService( 4018): Intent service name: GCMIntentService-DynamicSenderIds-3
D/lights ( 656): set_light_leds: type=1, color=0xffffffff, fM=1, fOnMS=500, fOffMs=2000.
D/lights ( 656): write_leds: color=0xffffff, delay_on=500, delay_off=2000, blink="0xffffff 500 2000".
V/GCMBaseIntentService( 4018): Releasing wakelock
E/MP-Decision( 1531): UP Ld:16 Nw:1.990000 Tw:140 rq:3.700000 seq:147.000000
D/MediaExtractor( 240): returning default extractor
D/AwesomePlayer( 240): Tunnel Mime Type: audio/vorbis, object alive = 0, mTunnelAliveAP = 0
D/AwesomePlayer( 240): Normal Audio Playback
E/AwesomePlayer( 240): LPAPlayer::Clip duration setting of less than 30sec not supported, defaulting to 60sec
I/AudioService( 656): AudioFocus requestAudioFocus() from android.media.AudioManager@427c6168
W/AwesomePlayer( 240): Trying to create tunnel player mIsTunnelAudio 0, LPAPlayer::objectsAlive 0, TunnelPlayer::mTunnelObjectsAlive = 1, (mAudioPlayer == NULL) 1
E/AwesomePlayer( 240): LPAPlayer::Clip duration setting of less than 30sec not supported, defaulting to 60sec
D/AudioSessionOutALSA( 240): setLpaVolume(7783)
D/AudioSessionOutALSA( 240): [B]Setting LPA volume to 7783 (available range is 0 to 100)[/B]
D/ALSADevice( 240): setMixerControl:: name LPA RX Volume value 7783 index 0
D/AudioSessionOutALSA( 240): setLpaVolume(7373)
D/AudioSessionOutALSA( 240): Setting LPA volume to 7373 (available range is 0 to 100)
D/ALSADevice( 240): setMixerControl:: name LPA RX Volume value 7373 index 0
D/AudioSessionOutALSA( 240): setLpaVolume(6956)
D/AudioSessionOutALSA( 240): Setting LPA volume to 6956 (available range is 0 to 100)
D/ALSADevice( 240): setMixerControl:: name LPA RX Volume value 6956 index 0
D/AudioSessionOutALSA( 240): setLpaVolume(6546)
...

At this point my ears are blown out, so I hit DownVolume ASAP, which spits out the following logcat snippet. It resets my volume to normal, but logcat still shows it to be outside the expected 0-100 range.

D/AudioSessionOutALSA( 240): Setting LPA volume to 8192 (available range is 0 to 100)
D/ALSADevice( 240): setMixerControl:: name LPA RX Volume value 8192 index 0
E/Sensors ( 656): accelHandler -0.597557 8.301138 4.410429
D/qdoverlay( 237): Set pipe=RGB1 dpy=0; Set pipe=VG0 dpy=0;
E/MP-Decision( 1531): DOWN Ld:31 Ns:1.100000 Ts:190 rq:0.000000 seq:196.000000
D/AudioSessionOutALSA( 240): setLpaVolume(308)
D/AudioSessionOutALSA( 240): [B]Setting LPA volume to 308 (available range is 0 to 100)[/B]
D/ALSADevice( 240): setMixerControl:: name LPA RX Volume value 308 index 0
E/MP-Decision( 1531): UP Ld:60 Nw:1.990000 Tw:140 rq:2.100000 seq:147.000000
D/qdoverlay( 237): Set pipe=VG1 dpy=0;
D/ALSADevice( 240): standby: handle 0x4125d850 h 0x0
D/alsa_ucm( 240): snd_use_case_set(): uc_mgr 0x40c08308 identifier _dismod value Play Music
D/alsa_ucm( 240): Set mixer controls for Play Music enable 0
D/alsa_ucm( 240): Setting mixer control: PRI_RX Audio Mixer MultiMedia1, value: 0
D/AudioUsbALSA( 240): exitPlaybackThread, mproxypfdPlayback: -1