any drawbacks to 64-bit versus 32-bit install?

[Dave Feustel]

On Tue, Nov 18, 2008 at 07:07:11PM +0000, Alan Cox wrote:
> 
> > I have read that html 5 will make flash unnecessary. 
> > 
> > Is there any truth to that assertion?
> 
> SVG certainly makes most of it unneccessary already.

What is SVG?

Thanks.