After a long wait, I decided to pull the plug on this one for an easier travel lens. Having to lug around a 22 month old does not help facilitating lens changes and/or carrying bulky bags with multiple lenses.
Two days into it, and I'm already loving the versatility! Currently visiting the in-laws in Perth, and we hit the Fremantle markets this afternoon...
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It happened to me once. It looked OK when viewing on my PC but rotated on the forum. Seems totally random.
What I did was use a different editor to the one I normally use and re-saved it to my desktop. Deleted the original and replaced it with the new one and all was then OK. Don't know if this step made any difference but I saved it once upside down then resaved it correctly in case something went wrong with the original save.