[USB-Audio - USB Device 0x46d:0x81a, recording] Wrong Frequency, then pulseaudio fails to detect card

I get this bug quite often with my Logitech C260 webcam. Unplugging and replugging the device solves the issue. I think it mainly happens if i boot with the device plugged or if i resume with the device plugged, but I'm not 100% sure that's the exact way to reliably reproduce the problem.

Basically, it looks like the sample rate is wrong. In dmesg, i get this message repeated many times.:
[ 1288.177481] 11:3:4: cannot set freq 48000 to ep 0x86
and the peak detector in the gnome mixer is updating with a visibly lower frequency. The sound is speeded up, both in the sound recorder and in skype. I have attached a recording to show my wonderful chipmunk voice. Diagnosing the problem with apport made it go nuts and now i can't even see the soundcards in pulseaudio (but i still see them in alsa), though it seems that the webcam mic volume is stuck (???) in alsamixer. This is the first time it causes problems to the whole pulseaudio. Usually people in skype just tell me I have a weird voice and I just unplug the webcam and replug it to get it to work, or just use the laptop mic.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: pulseaudio 1:1.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic-pae 3.0.4
Uname: Linux 3.0.0-12-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu2
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: riccardo 1659 F.... pulseaudio
 /dev/snd/pcmC1D0c: riccardo 1659 F...m pulseaudio
 /dev/snd/controlC0: riccardo 1659 F.... pulseaudio
 /dev/snd/pcmC0D0p: riccardo 1659 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf0800000 irq 42'
   Mixer name : 'Intel IbexPeak HDMI'
   Components : 'HDA:10ec0269,10250364,00100100 HDA:80862804,80860101,00100000'
   Controls : 24
   Simple ctrls : 13
Card1.Amixer.info:
 Card hw:1 'U0x46d0x81a'/'USB Device 0x46d:0x81a at usb-0000:00:1d.0-1.1.1.2, high speed'
   Mixer name : 'USB Mixer'
   Components : 'USB046d:081a'
   Controls : 2
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'Mic',0
   Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
   Capture channels: Mono
   Limits: Capture 0 - 6144
   Mono: Capture 4001 [65%] [21.62dB] [on]
Date: Fri Sep 30 12:35:06 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110921.2)
SourcePackage: pulseaudio
Symptom: audio
Symptom_Card: USB-Audio - USB Device 0x46d:0x81a
Title: [USB-Audio - USB Device 0x46d:0x81a, recording] Pulseaudio fails to detect card
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/04/2010
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.13
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Aspire 3820
dmi.board.vendor: Acer
dmi.board.version: V1.13
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.13
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.13:bd05/04/2010:svnAcer:pnAspire3820:pvrV1.13:rvnAcer:rnAspire3820:rvrV1.13:cvnAcer:ct10:cvrV1.13:
dmi.product.name: Aspire 3820
dmi.product.version: V1.13
dmi.sys.vendor: Acer