I’ve been working in GIMP lately, and I recently used PS, and I was just wondering why – when you select an area by color and you go to smear, white from outside the selected area is smeared into the selection?nnWhy is that? If you can understand what I’m saying ^^’ nnand is there a way I can stop that from happening? Probably not, right? nnThanks in advance! 
Source: http://answers.yahoo.com/question/index?qid=20100131100047AAJkf7a