5.3 and 5.4RC1 both fail with CD upon installation(5.1 did not)

[Joshua Kampmeier]

Here is the error I get when booting with(any) of the 5.3/5.4 discs:

acd0: CDRW <QSI CD-RW/DVD-ROM SBW-241/VX08> at ata1-master UDMA33
acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x00 ascq=0x00 error=0
acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x00 ascq=0x00 error=0
acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x00 ascq=0x00 error=0
acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x00 ascq=0x00 error=0
acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x00 ascq=0x00 error=0
acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x00 ascq=0x00 error=0
acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x00 ascq=0x00 error=0
acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x00 ascq=0x00 error=0
acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x00 ascq=0x00 error=0

then it starts sysinstall except when I try to start the installation it fails at mounting the CD-ROM. I can install in safe mode.. but then any time there is a cd in the drive upon boot-up.. i get errors again.