It looks like the swc file for release 2.0.4 was checked in before r74, which contains a bugfix that is supposed to be in version 2.0.4.  Was the swc file checked in before the code it was compiled from?

r74 | puremvc | 2008-08-14 15:09:24 -0400 (Thu, 14 Aug 2008) | 7 lines
Changed paths:
   M /trunk/src/org/puremvc/as3/core/View.as
   M /trunk/version.txt

2.0.4 Dissallowed re-registration of Mediators in View.registerMediator.
      For more on this bug, see:
      http://forums.puremvc.org/index.php?topic=372
      Modified View.notifyObservers to notify from a copy of the
      observer list rather than the actual observer list, which may
      change during the notification loop. For more on this bug, see:
      http://forums.puremvc.org/index.php?topic=490
------------------------------------------------------------------------
r73 | puremvc | 2008-08-14 15:08:25 -0400 (Thu, 14 Aug 2008) | 1 line
Changed paths:
   D /trunk/bin/PureMVC_AS3_2_0_1.swc
   D /trunk/bin/PureMVC_AS3_2_0_2.swc
   D /trunk/bin/PureMVC_AS3_2_0_3.swc
   A /trunk/bin/PureMVC_AS3_2_0_4.swc

updated swc

I like to comment on and edit documentation as I read it.  I'm reading through the 3/02/2008 version of the "Implementation Idioms and Best Practices" document as we speak and have a few small comments already.  What's the preferred method for giving feedback on the documentation?  Is source for the documentation available?