There are separate downloads for source RPMs for x86_64 and i386. As far as I could tell, the FC3 updates SRPMs were identical for the two architectures. This seems like a good thing, if it works. I use both architectures and would like the SRPMs, but hate wasting bandwidth and disk space. Are there important differences between the two packages of SRPMs? Should I download both? Should only one set of SRPMs be released? Perhaps with a small number of arch-specific SRPMS for those that don't work on all archs.