Headset has sound problems

I have kernel 2.6.18.1. I recently upgraded alsa both in the kernel and userland to 1.0.13.

Running btsco and kernel module without a recompile causes this:
kernel: EIP: [<f992054c>] snd_card_bt_sco_playback_open+0xac/0x110 [snd_bt_sco] SS:ESP 0068:d3d01e40

Solution was to recompile btsco and snd-bt-sco module.

However, now no sound issues from the headset and no microphone is picked up.

aplay -B 1000000 -D plughw:2 podbay.wav completes but nothing comes out of the headphones.

hcitool info for the headphone is:

        BD Address:  00:12:EE:E0:AB:CA
        LMP Version: 2.0 (0x3) LMP Subversion: 0xe1b
        Manufacturer: Texas Instruments Inc. (13)
        Features: 0xff 0xfd 0x29 0x78 0x18 0x18 0x00 0x80
                <3-slot packets> <5-slot packets> <encryption> <slot

offset>
<timing accuracy> <role switch> <hold mode> <sniff
mode>
<park state> <channel quality> <SCO link> <HV2 packets> <HV3 packets> <u-law log> <A-law log> <CVSD>
<transparent SCO>
<enhanced iscan> <interlaced iscan> <interlaced pscan> <inquiry with RSSI> <AFH cap. slave> <AFH class. slave> <AFH cap. master> <AFH class. master> <extended
features>

btsco -v during a session provides this:
btsco v0.42
Device is 2:0
Voice setting: 0x0060
RFCOMM channel 1 connected
Using interface hci0
recieved AT*ECBP=?
recieved AT+CLIP=1
recieved AT+CSCS="UTF-8"
recieved AT*SEAM="HBH-610a",13
recieved AT+CLAN?
speaker volume: 10 mic volume: 1
i/o needed: connecting sco...
connected SCO channel
Done setting sco fd
recieved AT+VGS=6
Sending up speaker change 6
speaker volume: 6 mic volume: 1
driver is not in use
disconnected SCO channel
speaker volume: 6 mic volume: 1
i/o needed: connecting sco...
connected SCO channel
Done setting sco fd
recieved AT+VGS=6
Sending up speaker change 6
speaker volume: 6 mic volume: 1
driver is not in use
disconnected SCO channel

This worked previously before the alsa upgrade (required to fix a problem with a soundcard).

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As an update, I found the following from dmesg:
snd-bt-sco revision 1.12 $
snd-bt-sco: snd-bt-scod thread starting
snd-bt-sco: playback_open
snd-bt-sco: prepare ok bps: 16000 size: 16002 count: 4000
snd-bt-sco: playback_trigger 1
snd-bt-sco: setting playback to bspcm
Bluetooth: SCO (Voice Link) ver 0.5
Bluetooth: SCO socket layer initialized
snd-bt-sco: Shift problem detected! Fixing to 1.
snd-bt-sco: Shift problem detected! Fixing to 0. ... (continued for a while)
snd-bt-sco: Shift problem detected! Fixing to 0.
snd-bt-sco: Shift problem detected! Fixing to 1.
snd-bt-sco: Shift problem detected! Fixing to 0.
snd-bt-sco: Shift problem detected! Fixing to 1.
snd-bt-sco: Shift problem detected! Fixing to 0.
snd-bt-sco: playback_trigger 0
snd-bt-sco: setting playback to NULL
snd-bt-sco: Disposing of previous socket count 3
snd-bt-sco: file_count is 1 (expected 3)

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http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642

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