Screencasts with zoom regions "ghosting" in HTML5
So I'm doing screencasts, and inserting them as video. Then I'm putting a zoom region on top of the video. In the SWF output, it looks perfect. However, in the HTML5 output, the leftmost 10 pixels of the screencast is being duplicated and added to the left sides of the screencast - creating sort of a "ghosting" effect. It happens with every screencast that uses a zoom region.
Is this a problem inherent in HTML5 publishing? Is there a workaround?
Thanks for your insights,