[root@monster ~]# pacman -Syu
:: Synchronizing package databases... 
:: current is up to date
:: extra is up to date
 community                [################] 100%     110K   113.5K/s  00:00:00
 kdemod                   [################] 100%      18K    24.7K/s  00:00:00
:: Replace netcat with gnu-netcat from "current"? [Y/n] y
:: Replace traceroute with iputils from "current"? [Y/n] y
:: Replace xfcalendar with orage from "extra"? [Y/n] y
:: Replace gaim with pidgin from "extra"? [Y/n] 
:: Replace xfce4-minicmd-plugin with verve-plugin from "extra"? [Y/n] 
:: Replace xfce4-iconbox with xfce4-panel from "extra"? [Y/n] 
:: Replace xfce4-showdesktop-plugin with xfce4-panel from "extra"? [Y/n] 
:: Replace xfce4-systray with xfce4-panel from "extra"? [Y/n] 
:: Replace xfce4-windowlist-plugin with xfce4-panel from "extra"? [Y/n] 
:: Replace xfce4-taskbar-plugin with xfce4-panel from "extra"? [Y/n] 
:: Replace xfce4-toys with xfce4-session from "extra"? [Y/n] 
:: pacman has detected a newer version of the "pacman" package.
:: It is recommended that you allow pacman to upgrade itself
:: first, then you can re-run the operation with the newer version.
::
:: Upgrade pacman first? [Y/n] error: unresolvable dependencies:
  pacman: requires libarchive but it is not in the sync db
  pacman: requires libdownload but it is not in the sync db