I am using Flash CS4 and when testing my application my frame rate changes as it is programmed to do so. When I try to run the application in a browser (tried Firefox 4, Opera 10.5 and IE 8) the frame rate does not change.
Why does the frame-rate not change? How do I fix it?
The newest Flash Players are capped at a maximum of 60fps, no matter what number you use to set the framerate. That could be one issue... But if objects on the screen are slowing down there's nothing to be gained by changing the framerate. It means that your swf isn't well optimized, and the player is struggling to render the assets.