In r7168, the messages are deleted after one hour from the archive (or your inbox). I have noticed it for "New headquarters", "Donjon occupied" and "Water found". However, the status updates from wood gnome are not deleted. So it seems to depend on the type of the message.
OT: @SirVer: I hope you enjoyed your vacation. Nice to see your back to Widelands.
In r7168, the messages are deleted after one hour from the archive (or your inbox). I have noticed it for "New headquarters", "Donjon occupied" and "Water found". However, the status updates from wood gnome are not deleted. So it seems to depend on the type of the message.
OT: @SirVer: I hope you enjoyed your vacation. Nice to see your back to Widelands.