--- a/pulseaudio.install	2010-11-27 07:07:12.000000000 +0200
+++ b/pulseaudio.install	2010-11-27 22:55:07.438921948 +0200
@@ -11,12 +11,14 @@
 }
 
 post_upgrade() {
-  # Delete old users and groups
+  # Delete old users and groups if upgrading from < 0.9.22
   # System-wide daemon not supported anymore
-  getent passwd pulse &>/dev/null && usr/sbin/userdel -f pulse
-  getent group pulse-access &>/dev/null && usr/sbin/groupdel pulse-access
-  getent group pulse-rt &>/dev/null && usr/sbin/groupdel pulse-rt
-  getent group pulse &>/dev/null && usr/sbin/groupdel pulse
+  if [ "`vercmp $2 0.9.22`" -lt 0 ]; then
+    getent passwd pulse &>/dev/null && usr/sbin/userdel -f pulse
+    getent group pulse-access &>/dev/null && usr/sbin/groupdel pulse-access
+    getent group pulse-rt &>/dev/null && usr/sbin/groupdel pulse-rt
+    getent group pulse &>/dev/null && usr/sbin/groupdel pulse
+  fi
 
   true
 }