Time Machine is a powerful solution to backup, restore or move your Mac OS X installation to another machine or just after a full reinstall of the operating system. The restore system is smart enough to put all your applications, profile files, and all other stuff which belong to you.
For some files and folders (for example MacPorts installation and XCode folder) the restore process, to be safe, renames that files or folder appending a (from old mac) string, wasting hard drive space.
