[When I move my mouse about the window it creates a trail of flashing black dots]

Hello, find the settings icon in the upper right corner of Paint.net 4.0 and click it. Then turn off "Hardware accelerated rendering (GPU)" and see if that fixes things for you.

Thanks so much!

[When I move my mouse about the window it creates a trail of flashing black dots]

I have a new Windows 8 computer and I like to edit photos. But I can't because of this bug. If anyone could help me out it would appreciated.

 

I don't have to click its just when I have my paint brush out and move my mouse about in the window it makes this black flashing trail of dots.