Flashplayer on 64bit
As you may have noticed there are some problems when you are using a 64bit system & flashplayer. The current 32bit only Beta requires a 32bit Flashplayer for its browser, but it's still just looking at some default generic directories. So here we go:
As far as 'strings' tells me there are 3 directories where Steam is searching for the Flash plugin:
Currently working workaround: Pick one of the 3 that does not exist and create it, then simply put the 32bit libflashplayer.so in there - every browser should by default skip incompatible files when searching for the plugin, so this shouldn't cause any problems with other 64bit programs that may try to load the Flash plugin.