I downloaded both ubuntu and kubuntu 8.10 beta (AMD64 versions) today and gave them a try.
My box is an Asus M2NPV-VM with integrated Nvidia Graphics (G-Force 6150) and two displays - a 1920x1200 Acer P243w connected on DVI-D and a 1280x1024 Benq FP931 connected on VGA.
The CD boots, but when I want to use the installer or the live CD, even if I start in safe graphics mode, the Acer is black and the Benq displays a mangled pixel salad.
I am sorry I don't have more feedback than this. If you need me to test / report something more, let me know.
[lspci]
00:00.0 RAM memory [0500]: nVidia Corporation C51 Host Bridge [10de:02f0] (rev a2)
Subsystem: ASUSTeK Computer Inc. Unknown device [1043:81c0]
00:05.0 VGA compatible controller [0300]: nVidia Corporation C51PV [GeForce 6150] [10de:0240] (rev a2) (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. A8N-VM CSM [1043:81cd]
Thank you for taking the time to report this bug and helping to make Ubuntu better. Could you please add your '/etc/X11/ xorg.conf' file and your '/var/log/ Xorg.0. log' file as attachments to your bug report? Thanks in advance.
Additionally, this may be a duplicate of bug 210340 - where the Live CD does not work with dual monitors.