In Photoshop CS2, both MDI child windows and the main window appear to be correctly themed, but on resize they will flicker with the windows 95 window theme, then flicker back to NTStyle's 3.1 theme - this will only occour if bottom right gripper is used to resize the window, and if you pull the gripper left or up (WTF?):
Correct styling:

When resizing using the gripper:
