title: j2me screen flicker when switching between canvases
body: <p>I'm writing a mobile phone game using j2me. In this game, I am using multiple Canvas objects.
  For example, the game menu is a Canvas object, and the actual game is a Canvas object too.
  I've noticed that, on some devices, when I switch from one Canvas to another, e.g from the main menu to the game, the screen momentarily "flickers". I'm using my own double buffered Canvas.</p>
  
  <p>Is there anyway to avoid this?</p>