Using magnifying tool and dragging the magnification pop-up onto toolbar causes the pop-up to get stuck at the top of the screen. It does not disappear after using magnifier again, causing multiple pop-ups to remain on screen even after the main window is closed. Happens in both fullscreen and window mode.
I'm using Skim v.1.4.15, OS X version 10.11.1, early 2015 MacBook Air.
That'sreally a system bug, as the system is responsible for redarwing the screen properly. We most definitely remove the popup. But perhaps we can work around this.
Actually, I really don't think we can work around this. Are you sure this also happens in normal window mode?
Is there anything in the logs in Cinsole.app?
Sorry, it is our bad. This will be fixed in the next release. For now, try to keep the mouse (center of the popup) inside the view displaying the PDF.