こんにちは
https://forums.ubuntulinux.jp/viewtopic.php?id=4976，その他の現象の検証のため、９．０４を数回・数台にわたりクリーンインストールしてみました。
結果は同じような現象が再現できました。

May 20 22:21:59 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.111" (uid=0 pid=28054 comm="/usr/lib/libgconf2-4/gconfd-2 "))
May 20 22:24:11 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.112" (uid=1000 pid=28383 comm="python /usr/share/system-config-printer/system-con"))
May 20 22:24:16 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.113" (uid=7 pid=28395 comm="hal "))
May 20 22:24:16 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.114" (uid=7 pid=28399 comm="avahi-browse -k -t -v -r -a "))
May 20 22:24:17 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.115" (uid=7 pid=28406 comm="bluetooth "))
May 20 22:24:17 funa-desktop2 dbus-daemon: Rejected send message, 2 matched rules; type="method_call", sender=":1.115" (uid=7 pid=28406 comm="bluetooth ") interface="org.bluez.Manager" member="DefaultAdapter" error name="(unset)" requested_reply=0 destination="org.bluez" (uid=0 pid=6192 comm="/usr/sbin/bluetoothd "))
May 20 22:24:51 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.116" (uid=1000 pid=28435 comm="/usr/bin/python /usr/bin/jockey-gtk --dbus-server "))
May 20 22:24:51 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.117" (uid=0 pid=28441 comm="/usr/bin/python /usr/share/jockey/jockey-backend -"))
May 20 22:24:51 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.118" (uid=109 pid=28446 comm="/usr/lib/policykit/polkitd "))
May 20 22:24:53 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.119" (uid=7 pid=28456 comm="hal "))
May 20 22:24:53 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.120" (uid=7 pid=28460 comm="avahi-browse -k -t -v -r -a "))
May 20 22:24:54 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.121" (uid=7 pid=28467 comm="bluetooth "))
May 20 22:24:54 funa-desktop2 dbus-daemon: Rejected send message, 2 matched rules; type="method_call", sender=":1.121" (uid=7 pid=28467 comm="bluetooth ") interface="org.bluez.Manager" member="DefaultAdapter" error name="(unset)" requested_reply=0 destination="org.bluez" (uid=0 pid=6192 comm="/usr/sbin/bluetoothd "))
May 20 22:27:41 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.122" (uid=0 pid=6824 comm="/usr/sbin/cupsd "))
May 20 22:27:57 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.123" (uid=7 pid=28500 comm="hal "))
May 20 22:27:57 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.124" (uid=7 pid=28504 comm="avahi-browse -k -t -v -r -a "))
May 20 22:27:58 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.125" (uid=7 pid=28511 comm="bluetooth "))
May 20 22:27:58 funa-desktop2 dbus-daemon: Rejected send message, 2 matched rules; type="method_call", sender=":1.125" (uid=7 pid=28511 comm="bluetooth ") interface="org.bluez.Manager" member="DefaultAdapter" error name="(unset)" requested_reply=0 destination="org.bluez" (uid=0 pid=6192 comm="/usr/sbin/bluetoothd "))
May 20 22:28:31 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.126" (uid=1000 pid=28532 comm="/usr/bin/python /usr/bin/jockey-gtk --dbus-server "))
May 20 22:28:31 funa-desktop2 dbus-daemon: Rejected send message, 1 matched rules; type="method_call", sender=":1.32" (uid=1000 pid=3530 comm="/usr/lib/indicator-applet/indicator-applet --oaf-a") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination=":1.127" (uid=109 pid=28539 comm="/usr/lib/policykit/polkitd "))

内容はdbus-deamon:『送られたメッセージが廃棄ルールに適合するため，廃棄しました。』（送ったのはindicator-applet、送られた先は様々（destination=/user/sbin/ または/user/lib/以下の各プロセス)
プロセス間通信機能の働きが悪い?→これもバグのうち?

まあ，実害がないのでこのまま何もしませんが,Ubuntu9.04だけのようです。８．１０、８．０４、Fedora10,CentOS5.3で確かめました（他にはsyslog>auth.log0やauth.log自体がない）。