There is a recurrent error when you copy (or cut) an image, paste it to a new layer, and right away you try to move that layer.
I uploaded a video showing how to reproduce that error (sorry I was speaking on the video but I failed to record my voice ^^U):
If you deselect (ctrl+d) then you can move the layer without errors, so not a big deal of an error, but since it is a bit bothersome I thought it would be a good idea to report it
P.S: I’m using Windows 7 ultimate 64 bits. Aseprite v1.2.10-beta4-x64 (but this error happens on previous versions too).