the tasks list is not displaying some entries

Thank you for your bug report. Could you describe steps to trigger the issue. Have you changed the configuration or are you using the standard one? Do you get the issue on different applications? Do you have any error to .xsession-errors when running into the issue?

It had only happened with Terminal, but now it has just happened with Synaptic. I don't really know what triggers it. All I have to do is to open an application (Terminal, through the Panel; Synaptic through the Main Menu), and then it happens. But, as I said above, it does not always happen.

I'm using the standard configuration. I've got this issue since I fresh-installed Hardy few days ago.

What follows is the content of the last lines of my .xsession-errors right after this problem happened with Synaptic. As far as I know, none of them seem to be relevant to this issue.

(firefox:7883): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

(firefox:7883): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

(firefox:7883): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

(firefox:7883): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

(firefox:7883): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

(firefox:7883): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

(evolution:7702): Gtk-CRITICAL **: gtk_status_icon_set_visible: assertion `GTK_IS_STATUS_ICON (status_icon)' failed

(evolution:7702): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Can't open file 'wordlist.db' in directory '/home/manu/.bogofilter'.
error #2 - No such file or directory.

Remember to register some spam and ham messages before you
use bogofilter to evaluate mail for its probable spam status!

(gnome-system-log:8552): Pango-WARNING **: Invalid UTF-8 string passed to pango_layout_set_text()

what locale do you use?

could you run env and attach the log to a comment?

en.US.UTF-8

Output of env:

manu@manu-laptop:~/Desktop$ env
GPG_AGENT_INFO=/tmp/seahorse-Edd0hi/S.gpg-agent:5585:1
SHELL=/bin/bash
DESKTOP_STARTUP_ID=
TERM=xterm
XDG_SESSION_COOKIE=dc4c2e9e73df8e6a7df900644806c412-1208812451.771024-499980496
GTK_RC_FILES=/etc/gtk/gtkrc:/home/manu/.gtkrc-1.2-gnome2
WINDOWID=58720348
http_proxy=http://:8080/
USER=manu
LS_COLORS=no=00:fi=00:di=01;34:ln=01;36:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:su=37;41:sg=30;43:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.svgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.lzma=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.rar=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:
SSH_AUTH_SOCK=/tmp/keyring-q86wCT/ssh
GNOME_KEYRING_SOCKET=/tmp/keyring-q86wCT/socket
SESSION_MANAGER=local/manu-laptop:/tmp/.ICE-unix/5467
USERNAME=manu
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
DESKTOP_SESSION=default
GDM_XSERVER_LOCATION=local
PWD=/home/manu/Desktop
LANG=en_US.UTF-8
GNOME_KEYRING_PID=5464
GDM_LANG=en_US.UTF-8
GDMSESSION=default
HISTCONTROL=ignoreboth
SHLVL=1
HOME=/home/manu
no_proxy=localhost,127.0.0.0/8,*.local
GNOME_DESKTOP_SESSION_ID=Default
LOGNAME=manu
XDG_DATA_DIRS=/usr/local/share/:/usr/share/:/usr/share/gdm/
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-4LG0ENRCzC,guid=6c6000a6693f2180cb3e180f480d03a5
LESSOPEN=| /usr/bin/lesspipe %s
WINDOWPATH=7
DISPLAY=:0.0
LESSCLOSE=/usr/bin/lesspipe %s %s
COLORTERM=gnome-terminal
XAUTHORITY=/home/manu/.Xauthority
OLDPWD=/home/manu/Desktop/paperbox-0.1.0
_=/usr/bin/env

that's not a gnome-panel bug

not a non-utf8 issue then, reopening you are the only one having the issue so it's likely due to something in your configuration not sure what though

seems to be similar to bug #144406, still weird, having a way to trigger the issue would be useful