Ubuntu-Mate 14.04 64x
nVidia GT620
Blender 2.76b
- Open the file.
- Press Ctrl-E - "Edge Slide".
- Slide the loop (the UV is not corrected)
- Click to accept.
- Check "Correct UV" in left panel (now, it's corrected).
- Slide the loop again and again and its UV is corrected at any time.
Now...
- Use the same loop.
- Press G, then G (Edge Slide mode).
- Slide the loop. As "Correct UV" was checked, the UV is corrected.
- Click to accept.
- Check "Correct UV" in left panel: it is unchecked
Note that this bug affects to the UI, because, internally, "Correct UV" is True. If I check that option again, nothing happens. If I uncheck it, it stops correcting the UV.