Lame. Personally I see this as a sort of laziness on the part of the programmers. You also see this with plugins quite often too. The development of 64 bit versions lags behind that of the 32 bit ones. I think they don't like writing the 64-bit versions of platforms because these are harder to put together and write than their corresponding 32 bit counterparts. As long as it is possible to run a 32 bit version of the browser on a 64-bit operating system though I suppose I'll be okay with it but I'm sick of all the excuse making people dole at instead of being honest and just saying they don't want to go that extra mile because it's hard and they don't like doing it.