Comment 4 for bug 471553

Mario,
Your syslog indicates that you didn't have network access at the time of installation. It is by design that you would see this message on reboot if you had preseeded all of the languages but ubiquity was unable to install them. Is this just an oversight, or are you requesting that we provide a mechanism to avoid the incomplete language support question altogether?

I did notice on my machine, however, that there appears to be a bug in gnome-user-guide-gu, which erroneously contains gnome-access-guide-ar.omf, amongst other files present in other packages. This will always fail to install, and thus will force the presence of the incomplete language support message.