Why is video screen split with two identical pictures?

[Lotus14]

Following a clean reinstall of Windows XP and Internet Explorer 8,  Flash Player 11.6.602.180 was downloaded.  Video clips now play with screen split horizontally by a green line and identical pictures above and below, compressed vertically to suit.

Lotus14

[pwillener · Accepted solution]

Most likely you are running an outdated graphics driver; see http://forums.adobe.com/thread/945765

[Lotus14]

Magic! Videos now playing correctly. Many thanks for your help.

Lotus 14