A pure 64-bit environment is extremely rare. There are only a few distros in which one actually could do it -- VidaLinux/Gentoo 2005.0 without multilib, *maybe* Debian, and Slackware, if Slack ever creates a 64-bit environment.

All the rest are still somewhat 32-bit reliant, as E@zyVG found out.

~~ Andrew D.