I'm not sure if this is a bug or not, or just some part of the patch notes I missed, but I've noticed in my most recent game that several tiles which were completely devoid of resources when I first discovered them had gained resource icons on them (suitable for city-founding) once my city borders had reached them.
This isn't unwelcome, but is this supposed to happen? I certainly don't remember it happening before the 0.75 patch.
