Quoting Mark Knecht <markknecht(a)gmail.com>om>:
All I can say is that while 64-bit
Linux works, and works well, there are a lot of real
world limitations
in terms of accessing media from the web. While no where near as bad
as they used to be you will likely run into issues with Java and Flash
under 64-bit, and the decoders for things like Windows media file
types are almost always a bit more difficult than on our 32-bit
machines
Adobe has just released a 64bit beta of flash 10 for linux:
http://labs.adobe.com/downloads/flashplayer10.html
And with the latest releases of mplayer/ffmpeg it very rare to having
to resort to binary-only (32bit) codecs. The only times I've had to
use them were some realplayer10 file, and as for wmv the only
unplayable ones I've encountered are the DRM:ed ones and I don't think
they can be played in linux whatsoever.
- Peder (who speaks out of his ass since he doesn't even run 64bit)