Hello,
A little exception, with no consequences:
1) Open two images.
2) Maximize the two images windows.
3) Go to menu Window > Cascade Windows (or Tile Windows)
4) Exception shows (attached). OK to continue with no issues.
Workaround: don't maximize more than one image before select cascade or tiles.
PI 01.08.04.1195 @ Windows 7.
Greetings,
Enzo.