system hangs at "...boot from CD" prompt

I have the official RC1. I checked the MD5 sum and it came out fine (for once). I did not burn the DVD at max speed so I could avoid write errors. However, I have tried to boot from the DVD on 3 computers and cant get past the "Press any key to boot from CD" prompt. the weird thing is, all 3 computers display "Press any key to boot from CD o"
I press a key and nothing happens. Why is that little "o" appearing at the end?

If you've tried this on three different PCs and they all do this, it does sound like the burn process has gone wrong (as the checksum is fine). I'd try burning it again and see if it works this time

Just did that and still no luck...
now the prompt says "Press any key to boot from" on each computer...
Will try burning at 4x now...