Rendering problems with Macintosh ATI Rage or Radeon cards
Issue
There is a known conflict with the ATI Graphics Accelerator extension, version 3.7.9 and Flash. This conflict can cause rendering issues when drawing in the Flash editor. For example, black and white boxes might fill the stage when the pencil tool is used. A refresh of the screen (such as hiding and redisplaying the application window) will clear any lingering redraw effects, but they may appear again upon further use of the drawing tools.
Solution
Apple has released a version of OpenGL which resolves this issue. Please go to the Apple Developer Center to download OpenGL. After completing the OpenGL installation, Flash will not experience any rendering issues.
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