Canonical has announced the availability of Ubuntu 8.04.1 LTS, the first update of a product that comes with free long-term security support: "The Ubuntu team is proud to announce the release of Ubuntu 8.04.1 LTS, the first maintenance update to Ubuntu's 8.04 LTS release. This is the first maintenance release of Ubuntu 8.04 LTS, which continues to be supported with maintenance updates and security fixes until April 2011 on desktops and April 2013 on servers. The Ubuntu team has focused their efforts on resolving issues reported by people deploying Ubuntu out in the real world, including: Firefox has been upgraded to the final 3.0 release; the Samba client allows LANMAN authentication again; various problems with the FUSE interface to GNOME's new virtual file system have been fixed.

Which Version should you choose?

Standard personal computer (x86 architecture, Pentium™, Celeron™, Athlon™, Sempron™)
You Should Choose the i386 version.

64bit AMD and Intel computers
You should choose the amd64 version.

The "Alternate" CD does not include the Live CD, instead it uses a text-based installer.