That was released Sept 27 I think, remind me, when did Vista 64 bit come out? Just saying.
Because you couldn't possibly have ran a 32bit version of firefox or Opera, complete with the 32bit version of flash on either Vista64 or 7, right?
Writing off an entire 64 bit OS ecosystem because not all apps are 64 bit nor is there the need for them to be?
Seriously your complaint is a complete non issue. If you're building flash applications that are drawing more ram than a 32bit environment can offer, something somewhere in your program something has gone very, very awry. If by some coincidence you are actually coming across this, the question really has to be: Would what I'm building be better suited to some other programming language?