This is more curiosity than a bug report, as the end result was OK. AF Photo on Windows 10 system. I was using the rounded rectangle tool on a jpeg, which I then saved as a .png file (to get rid of the square corners). The file saved correctly, but when I moved the base layer on top of the rectangle there was a small orange dot in the upper left corner. That is the same corner I started the rounded rectangle at. The dot did not appear on the saved file but I captured my screen with the snipping tool (see attached image). I'm wondering if that dot might serve some function in Photo. I've never seen this before when using the RR tool.