I have always included flex libraries in the application swf, so I have never paid attention to the conents of each one, since now I will start leaving them as RSLs I would like to know:
What is the usage of "utilities.swc" file?
Why there are two files "flex.swc" and "framework.swf" isn't flex the framework? Why is split into two files?
I have already found what "playerglobal.swc" contains.
"Playerglobal.swc includes just the interface definitions for classes that are in the Player. The code itself is all baked into Flash Player.." (by Matt Chotin at http://forums.adobe.com/thread/423432)