When doing a custom install, choices of "groups" of packages (development, NFS server, GNOME, etc.) are given. However, there are a lot of packages without any group. If I select all available groups, I install 821 megs of software. If I select everything, I install 1229 megs of software. Those other 408 megs of software should also either be put into existing groups, or have additional groups made for them....
Improving the grouping of packages is a continuing process we are aware of.
*** Bug 55720 has been marked as a duplicate of this bug. ***