It's happening on my box too. If it helps, here's the output to "lspci | grep Audio":
00:1b.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller (rev 03) -- System Information: Debian Release: squeeze/sid APT prefers testing APT policy: (650, 'testing') Architecture: i386 (i686) Kernel: Linux 2.6.26-1-686 (SMP w/2 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages pulseaudio depends on: ii adduser 3.110 add and remove users and groups ii consolekit 0.3.0-2 framework for defining and trackin ii libasound2 1.0.19-1 shared library for ALSA applicatio ii libasyncns0 0.3-1 Asyncronous name service query lib ii libc6 2.9-4 GNU C Library: Shared libraries ii libcap2 1:2.16-4 support for getting/setting POSIX. ii libdbus-1-3 1.2.12-1 simple interprocess messaging syst ii libgdbm3 1.8.3-4 GNU dbm database routines (runtime ii libltdl3 1.5.26-4 A system independent dlopen wrappe ii liboil0.3 0.3.15-1 Library of Optimized Inner Loops ii libpolkit-dbus2 0.9-3 library for accessing PolicyKit vi ii libpolkit2 0.9-3 library for accessing PolicyKit ii libpulsecore9 0.9.14-2 PulseAudio sound server core ii libsamplerate0 0.1.7-2 audio rate conversion library ii libsndfile1 1.0.18-2 Library for reading/writing audio ii libspeexdsp1 1.2~rc1-1 The Speex extended runtime library ii libwrap0 7.6.q-16 Wietse Venema's TCP wrappers libra ii lsb-base 3.2-22 Linux Standard Base 3.2 init scrip Versions of packages pulseaudio recommends: ii gstreamer0.10-pulseaudio 0.10.14-2 GStreamer plugin for PulseAudio ii libasound2-plugins 1.0.19-2 ALSA library additional plugins ii padevchooser 0.9.3-2 PulseAudio Device Chooser ii paprefs 0.9.6-2 PulseAudio Preferences ii pulseaudio-esound-compat 0.9.14-2 PulseAudio ESD compatibility layer ii pulseaudio-module-hal 0.9.14-2 HAL device detection module for Pu ii pulseaudio-module-x11 0.9.14-2 X11 module for PulseAudio sound se Versions of packages pulseaudio suggests: ii paman 0.9.4-1 PulseAudio Manager ii pavucontrol 0.9.6+svn20080426-1 PulseAudio Volume Control ii pavumeter 0.9.3-1 PulseAudio Volume Meter ii pulseaudio-utils 0.9.14-2 Command line tools for the PulseAu