output.icecast.vorbis( stereo = false ) fails to output mono as requested

Winamp and VLC both report a Stereo stream from there respective stream information code.
Winamp hears a faint output, on the R channel

VLC showed some audible anomaly's on 1 certain file being played from playlist() but was silent on another, when on the R channel
after 68 minutes or so, the stream went totally unintelligible *grabled*
http://rafb.net/p/vRzznM79.html configuration found here.
upoun toots sugestion to set(frame.channels,1) the output here http://rafb.net/p/KOF1gC68.html

Liquidsoap 0.3.7 (trunk/liquidsoap@rev5671).


sound card info:
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)

root@Merry:/home/aear# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 6
model name : Intel(R) Pentium(R) 4 CPU 3.20GHz
stepping : 5
cpu MHz : 3200.000
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 6
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pebs bts sync_rdtsc pni monitor ds_cpl est tm2 cid cx16 xtpr lahf_lm
bogomips : 6389.91
clflush size : 64

processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 6
model name : Intel(R) Pentium(R) 4 CPU 3.20GHz
stepping : 5
cpu MHz : 3200.000
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 6
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pebs bts sync_rdtsc pni monitor ds_cpl est tm2 cid cx16 xtpr lahf_lm
bogomips : 6384.00
clflush size : 64


root@Merry:/home/aear# cat /proc/meminfo
MemTotal: 1034232 kB
MemFree: 17396 kB
Buffers: 3184 kB
Cached: 484204 kB
SwapCached: 31120 kB
Active: 785344 kB
Inactive: 182680 kB
HighTotal: 129916 kB
HighFree: 264 kB
LowTotal: 904316 kB
LowFree: 17132 kB
SwapTotal: 3028212 kB
SwapFree: 2819736 kB
Dirty: 168 kB
Writeback: 0 kB
AnonPages: 480736 kB
Mapped: 107020 kB
Slab: 19704 kB
SReclaimable: 7560 kB
SUnreclaim: 12144 kB
PageTables: 3672 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 3545328 kB
Committed_AS: 1348056 kB
VmallocTotal: 114680 kB
VmallocUsed: 46576 kB

root@Merry:/home/aear# icecast2
Icecast 2.3.1