I posted a while back about problems I was having with a Quad Core Intel Core 2 CPU system running Vista 32 and AVCHD video. I since upgraded to a newer core i7 system running Vista 64.
After finishing a couple of projects I must say, the new system is far better. The entire process is much smoother, and way fewer glitches. I used to have 4GB of memory on the old system, the new one has 6GB but I think the major difference is in the memory management.
Vista 64 seems to dedicate a lot more physical memory to the 32 bit processes, resulting in far less paging, and far fewer problems with larger projects.
AVCHD editing is no longer a chore either, the entire process is just much smoother.
Just thought I'd report back and say that I find elements 7 runs much better under vista 64 than it did with vista 32 on my old system.
In the old setup, if I applied a lot of effects to clips, I would periodically get the "running low on memory" requestor and have to save/leave and reload the project. It would then be fine for a while before I had to do that all over again.
With the new setup, I've yet to have to do that. It never runs low on memory like it did before. I think it's just much more robust memory management by the OS now.