libflash (64 bit) problem on kongregate.com

[Loïc Grenié <loic.grenie@gmail.com>]

    Hi all,

   I have a 64bit Debian (sid) system. I have a problem with libflash.
  I've installed flashplugin-nonfree and the plugin is reasonably
  recent (11.1.102.62). However on some (most, all ?) kongregate
  games, I cannot get to the effective game. For instance:

http://www.kongregate.com/games/TheSunrize/netbots

  gets through the "Armor Games" splash and becomes solid
  gray.

    Is it a known problem ? Does anybody know how to get
  the *actual* game ?

    Thanks a lot,

            Loïc