generation

I made a brand new save fresh off the 0.7.8 patch, played for a few hours, saved, went to sleep, played it earlier today and all was normal. After re-joining the game just now, I've found some major errors in the biome loading. The salt flat was not there originally, nor was the mountain...

I've seen people struggling to know if they've found it, from the above description in the 0.7.6.4 patch notes. But is this it, when it happens to be surrounded by mountains and desert. Is that a deliberate thing that can happen too...?: (Full resolution.) The area kind of reminded me or...