Background colour trouble vs immediately framejump

I use a small subapp to control the jump to other frames then. Means first i open the framejump subapp and then jump to this and that frame in the subapp then. Works fine. With one little problem.

I have set all my background colours to a dark colour. So normally you shouldn't notice a colour difference in the short moment when it loads the framejump frame and then jumps to the frame i need it to.

But the background colour in the short moment where it jumps to the next frame is not equal the other frames, and not equal the colour i have setup. It is a light grey. A system colour grey. No matter how i setup the frame.

Here some screenshots about the problem:

This is my initial frame where i jump to another frame then:

http://reinerstileset.4players.de/ext/framejump1.jpg

In the moment it jumps the frame becomes grey. That`s the part i dislike. It's like a flash effect:

http://reinerstileset.4players.de/ext/framejump2.jpg

Then it goes on with another funny thing. Because it is setting the width of the next frame in one cycle ...

http://reinerstileset.4players.de/ext/framejump3.jpg

... and the height in another cycle.

http://reinerstileset.4players.de/ext/framejump4.jpg

But resizing the window stands in one event.