Invalid pixels have transparency set to 100% yet they are not black. These pixels are inverting background color if used on cursors. They should not be present in normal images.
1211
Invert
1212
Invert color of each pixel (subtract its color from white).
1213
Invert colors
Renkleri ters çevir
1214
It is recommended to save and close all other documents and restart the program.