Found out what was creating this bug , it have to do when you draw a icon or something with the image editor, replacing the image don't work, only deleting it. Everything is back to normal. (have done this hunderds of times and this is the first time I notice this)
Most time to test I draw icons that I use as triggers for testing etc. but now I know this I wont do that anymore.
Don't know either when you make a image smaller as 128x128 if that can cause a error, because standard the image editor is set at 128x128?