I really wish people would stop it with oxidation already. It's been ruled out as a cause, and any further mention of it is just muddling the conversation, unless you have some data. It's most likely a non-oxidative chemical reaction of some kind.
Think of it this way, if every noob who used too much star-San and splashed while bottling got this result it'd be a ****ing epidemic and there'd be loads of threads dedicated to avoiding it. Well, there's not, most likely because the most common causes are not what's at work here.