There have been other reports of similar rendering bugs and all have been tied to other software running simultaneously. See for example the "Render bug" post. You might try closing other programs? Maybe even some running in the background...


> Hello, I downloaded tracker today but I have been
> having an issue with the user interface. I had used
> this app a couple of years ago in my physics course
> without issue, and it was a great app, so I am hoping
> someone can diagnose the problem.
>
> The issue I am
> having occurs when I have a video file loaded into
> the app.  Every time I scroll over one of the menu
> buttons, the app will redisplay the current frame
> of the video at the coordinate of the menu button.
>  Scrolling back over the button will cause it to display
> on top of the video frame in its usual location, but
> within seconds, the UI becomes a garbled mess (see
> attached image).
>
> I will gladly provide any necessary
> specs on my device or the software I am using to help
> resolve this issue.