yes this happens on my website aswell
for iphone users only though – would be great to get a fix, but i think it may be due to the iphone using the original state of the image
i know a few of mine where taken of properties and i have rotate them to be square….those are still showing incorrectly on the phone.
apologies this doesnt help, but i dont think this is the plugin – i am thinking more apple or image related – unless the images used on the authors website where always “straight” to begin with