I'm having exactly the same problem with the live CD & DVD on two different systems. The CD & DVD both boot, but I don't have a bottom bar (makes it hard to take a test drive).
- Desktop with Pentium 4, 512MB RAM, Intel 82865G graphics controller
- Laptop with Celeron M, 1GB RAM, Intel 82852/82855 GM/GME graphics controller
Note that I checked the MD5 and verified the burns.
Both systems boot up Ubuntu (don't hit me!) from CD just fine.
Looking forward to wise advice from the forum members.