Whoops, was beaten to replying. Well, even so:
This data takes time to generate because it's based on simulations (of which many are run), so it isn't done until right before the official release. New units in the prereleases thus have no data yet, so they show as that. They used to display 'ERROR', but Chris changed this to 'NOT COMPILED' due to the number of comments he got about it. Perhaps it should be even more descriptive in future versions, but regardless, thanks for the note.
Always good to make sure.