Right, like when you create a new folder, the name isn't automatically selected. So in OS X, you have to push Return before you can enter a new name for that folder.
Ripcord: Some programs, especially browsers, use Home and End to go to the top or bottom of the page. Others, like Word, use Cmd-Home or Cmd-End, and simply pushing Home or End goes to the beginning or end of the text line, like you pointed out.