This could be a bug, but it might not be. It seems since 4.0.3 that Carbonite does not use "area markers" to mark where mobs are for a quest. It only uses the points to point to a specific spot, which isn't very helpful for quests with mobs that are spread out.
Not a bug. Look or search through the forums, there's been enough threads on this already. Short version: the database is being updated; this will take a few weeks.