Descriptive Problem Summary:
Dragging a window to the top of the screen in Windows 7 offers a "snap" maximize function. This does not fire an on-size event like using the Maximize button or double clicking the titlebar does.

You can see it in action by viewing the title splash here: 67.207.147.44:55678
Dragging the child splitters, double clicking the titlebar, using the maximize and restore buttons will all fire on-size and the title screen will fill the map area once again. Dragging a non-resized window to the top of the screen will maximize the window but apparently does not fire on-size.

Numbered Steps to Reproduce Problem:
1) restore window to un-maximized state if necessary
2) drag the window by the titlebar to the top of the screen
3) release when Windows shows a ripple effect and a "preview" of the window occupying the entire screen
4) Window is maximized, Dream Seeker does not fire an on-size event

Does the problem occur:
Every time? Or how often? Every time.
In other games? Likely.
In other user accounts? Yes.
On other computers? Yes.