I’ve spent a ton of time playing with codecs and colorspaces while developing PhotoStructure. These artifacts aren’t where I’ve seen them before. Normally you

I’ve spent a ton of time playing with codecs and colorspaces while developing PhotoStructure. These artifacts aren’t where I’ve seen them before. Normally you’d see this sort of posterization and clamping around global highlights and shadows, especially if the incorrect colorspace profile was applied, but this seems like the affected border is around a localized area, possibly due to a buggy pseudo-HDR implementation (what you see when you move the “pop” adjustment slider, which increases localized contrast ranges). Google+ images had a mild pop adjustment applied automatically.