Among the biggest changes in Flash Player 10.1 are support for hardware acceleration for H.264 video content. That means if you’re using the Windows version of Flash 10.1, your computer’s graphics card may be able to do the heavy lifting when it comes to decoding Flash video. Unfortunately this doesn’t work with all graphics cards.
Intel GMA 950 and GMA 3150 graphics need not apply, but if you have a laptop with NVIDIA ION graphics or Broadcom Crystal HD video accelerator then you should be able to watch high definition Flash video. Most recent ATI and NVIDIA graphics cards should also work, as well as Intel GMA 4500MHD integrated graphics.
Flash Player 10.1 also supports private browsing in Firefox, Google Chrome, and Internet Explorer. Up until recently, if you visited a web site while using your browser’s private mode, the browser wouldn’t keep any cookies or other data — but Adobe Flash Player would. Now it doesn’t.
Flash Player 10.1 is available as a free download from Adobe.