Using the graphical installer to do a full install, if both "use graphical login" and "customize X" are selected, the resulting /etc/inittab incorrectly sets the default runlevel to 3 (instead of the intended runlevel 5). If the "customize X" button is not selected during the install, the installer correctly sets a default runlevel 5.
*** This bug has been marked as a duplicate of 5532 ***