I was trying to plan ahead a good composition for some clumped field of galaxies on Virgo. Centering any of the galaxies will give me a not balanced composition, so I want to center my fields on an empty place. I've tried to add a flag on this location so, I can see it on the next maps and I'll have someplace to goto. But I have discovered that with 3.5.2 is almost imposible to place a flag where I want.

On the next sequence you can see the popup menu that appears as I press on right button over the center of the intended field. Then I chose add a flag and fill the information. As you can see on the third screen shot the flags never land on the clicked coordinates.