>>> There are 32 bit versions and 64 bit versions. From what I have heard,
>>> the 64 bit version is crap right now, and needs a service pack or two.
>
>Actually, I am using the 64 bit version and I am pretty happy with it.
>
>The only thing is that it is more restricted on the driver side, so at times it is difficult to find the right drivers until manufacturers catch up. This hasn't been too much of a problem for a work machine, but it might be a problem at home.
>
>Oh, and some database things that require 64 bit drivers (such as VFP OLEDB) just isn't supported anymore. At all.
>

Also, 16-bit applications like FPW26 won't run on Vista 64-bit:

http://msdn2.microsoft.com/en-us/library/aa480152.aspx#appcomp_topic8