No, 10.1 is not required, but if you setup your SWF to require 10.1 APIs your SWF may not run on 10.0.
On 5/8/10 11:36 PM, "dorkiedorkfromdorkt...@gmail.com" <dorkiedorkfromdorkt...@gmail.com> wrote: I'm using Flash Player 10,0,45,2 and the project is not loading completely. Does Flex 4 SDK require FP 10.1? It loads fine if I use that version. JP -- Alex Harui Flex SDK Team Adobe System, Inc. http://blogs.adobe.com/aharui