Especially when it comes to IPv4, the delegated-latest file informations are a pain in the ass: Our database contains big chunks like /20s, which are not announced via BGP, so we cannot show an AS for it, and so on.
IMHO, we should parse the inetnum file again as it is at least less worse.
This ticket is not a blocker for the release, but of course should be worked on.
A test environment has been set up for Peter.
This is currently under active development.
*** Bug 12435 has been marked as a duplicate of this bug. ***
This is fixed by now.