Quite understand your frustration Matt. If Vista 64 will run 32 bit programs, you could try downloading the 32-bit and see if that solves the problem for you.
Adobe would have preferred to have just added a switch to go between 32 and 64 bit - that's what they've done with the Mac version - but the Windows code is completely different and would have become bloated.
As far as the poor print-module goes, I'd agree, there are still some problems. Many of those problems, particularly with 64-bit though, come down to the printer drivers not being fully 64-bit compatible, so the printer manufacturers have some work to do too. The joys of cutting edge technology, eh?