Hello,
I'm playing with a CentOS 7 iso (CentOS-7.0-1406-x86_64-DVD.iso) in Oracle VM, configuring the virtual machine as  PVHVM.
When starting a graphic installation the VM gets a blocking error (a text install completes ok instead).
Apart from debugging the probable reason of graphic driver, taht I'll investigate later, I see that the anaconda error debug page contains:

Report a bug to Red Hat Customer Portal

that should be changed in my opinion.
See:
https://drive.google.com/file/d/0BwoPbcrMv8mvbTVEN3FYRWJ0dFh4WFVGeWs2ZjE1SFE3M1BZ/view?usp=sharing

Donna if already fixed in follwing ISOs.

Gianluca