Comment 19 for bug 35530

Although not a solution to the ACTUAL bug, you can work around this by holding down the <shift> key on your keyboard at the POST screens until you are prompted "Load boot graphics (y/n)? y". Select "n" for no. From there you will have to create the boot command manually. I recommend using a combination of "F1" to list the help index and "F3" to list the different boot methods.

This is a known issue with isolinux and the GUI boot menu. There needs to be an upstream patch to actually correct this issue.