Bug? Texture Map Orientation

Having an issue with texture map orientation randomly flipping. This bit me badly just now after an 12 hour movie render. I had verified that it was in the correct position prior to running the job by previewing the camera window in Accurate. The resulting rendered movie and stills had the map reversed.

I have found that this happens randomly and my solution would be to reverse the actual JPG in Photoshop so that it would appear correctly in Visualize after hitting the refresh button. When I it randomly flips again I repeat.

Just now I noticed that when having two viewports, the active one in accurate and the other in the preview. They are not in agreement.

Anyone else experience this? Any thoughts on possible resolutions?