Moving this discussion to the Using Flash Player forum.
Please supply the following information so that we may provide further assistance:
- OS (including specific version):
- Flash Player version:
I'd start with disabling Hardware Acceleration, as described in the video troubleshooting guide below:
If that solves the problem, make sure that your graphics drivers are current.
If it *still* happens with current drivers, please give us detailed information on the graphics card and driver, so that we can disable hardware acceleration on this configuration and start a conversation with the appropriate vendor.
The best way to get this information is to do the following (on Windows):
Open a command prompt
This should launch the DirectX Diagnostic Tool
Click Save All Information (or whatever that save button says).
Paste the contents into a reply here, or you can click Use Advanced Editor in the upper right of the reply window, and then attach the file using the link at the bottom right of the reply window.