I've noticed that in the latest database dumps (or at least, in the dump of July 9) the cities of Shrewsbury and Oxford (in the UK) have lost their admin1 code (I think it was there in previous dumps).
Is this possible? What happened?
Thanks in advance.
You are right. There was a bug in the 'move' function and the admin code sometimes got deleted. The 'move' function does a reverse geo code lookup to determine country and admin codes of the new lat/lng. For some countries we don't yet have the admin boundaries and in these cases the previous admin code got deleted.
I have restored the lost admin codes and fixed the 'move' function to keep the previous admin codes.