Running the updated setup program (boot-RHEA-1999:044.img) and after entering "linux updates" at boot prompt, the program hangs after the messages Checking for writable/tmp... yes running install... running /sbin/loader
Are you performing a CDROM installation? If so, is the CDROM in the drive when you start the installation? There is a known race condition on some machines which will cause a hang at the "running /sbin/loader" line if the CDROM is in the machine when you boot the updated boot images. The workaround is to just wait until you are prompted for the CDROM to insert it into the drive. Please reopen this bug if you are seeing a different problem.