As you can see in the picture below, I sometimes get that effect (that whitey trace or how do you want to call it). Does anybody know why that happens? It’s just annoying and it looks bad too 
are you using a Canvas??
If so you may want to call canvas.repaint() when a dialog is moved like that.
basixs said:
are you using a Canvas??
If so you may want to call canvas.repaint() when a dialog is moved like that.
No, I'm using a jMEDesktop to which I add my Swing stuff.