Description of problem: Inconsistent with other menu operation, pressing <enter> with input focus on either MBR or "First sector of boot partition" but not on the "OK" button will still exit the menu and proceed. How reproducible: go to "Boot Loader Configuration" menu of installer in text mode press <enter> key with MBR or "First sector..." highlighted. Expected results: Pressing <enter> key when the "OK" button is not focused should not complete this dialog and proceed.
This is fixed for RHEL4.