indicator-sound-service crashed with SIGSEGV in xcb_setup_vendor_end()

Binary package hint: indicator-sound

the audio works, the indicator and the volume control seems to works.

ProblemType: Crash
DistroRelease: Ubuntu 10.10
Package: indicator-sound 0.4.7-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Wed Sep 22 21:01:22 2010
ExecutablePath: /usr/lib/indicator-sound/indicator-sound-service
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
ProcCmdline: /usr/lib/indicator-sound/indicator-sound-service
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=it_IT.utf8
SegvAnalysis:
 Segfault happened at: 0x7f1c2323c3c0 <xcb_setup_vendor_end>: movzwl 0x18(%rdi),%eax
 PC (0x7f1c2323c3c0) ok
 source "0x18(%rdi)" (0x00000018) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: indicator-sound
StacktraceTop:
 xcb_setup_vendor_end () from /usr/lib/libxcb.so.1
 xcb_setup_pixmap_formats_iterator () from /usr/lib/libxcb.so.1
 xcb_setup_roots_iterator () from /usr/lib/libxcb.so.1
 pa_x11_get_prop () from /usr/lib/libpulsecommon-0.9.21.so
 ?? () from /usr/lib/libpulse.so.0
Title: indicator-sound-service crashed with SIGSEGV in xcb_setup_vendor_end()
UserGroups: adm admin audio cdrom dialout dip fax fuse lpadmin mythtv netdev plugdev polkituser sambashare tape video
XsessionErrors:
 (polkit-gnome-authentication-agent-1:3630): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (nm-applet:3641): Gdk-CRITICAL **: IA__gdk_window_thaw_toplevel_updates_libgtk_only: assertion `private->update_and_descendants_freeze_count > 0' failed
 (nautilus:3627): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed