When I zoom in and zoom out of the FlowChart, the overview Tracking rectangle starts changing the height/width ratio incorrectly - and becomes fatter or thinner - not according to the chart.
Here's an example:
http://albums.tapuz.co.il/Albums/getImage.asp?a=1248443&b=0&c=124844320076314373...

(The red rectangle is the the tracking rectangle - I've changed its size)

I will try that, thanks.

What are the document size and the overview frame size?

Thank you,
Stoyan

I got the steps that cause it.
When I zoom in, the zoom-in happens from the start of the diagram - and this means that the entire diagram is zoomed and moves.
Explanation: If I stand with a box almost in the view on the top left, zooming in will most probably enter the box inside the view since the entire diagram stretches.

This doesn't happen on the Overview rectangle. The bottom and right edges of the rectangle change their position correctly, while the top and left edges stay in place. So in the example I gave before, the Box will enter the view, but the Overview will show it still outside of view.
Moreover - the Rectangle dimensions will distort.

Yup.

Still - the same thing happens.
Look here:
http://www.tapuz.co.il/albums/album/default.asp?a=475917&u=1248443&ao=1
In this directory I hacve inserted 8 pictures, showing 8 zoom steps (from pictures 1, zooming in to picture 8 ). See how the Overview rectangle becomes "squashed" and disappears.

OK. I'll be waiting for a new version when you'll have a stable one.