I have downloaded 64 bit live cd version and burned image to a cd with no issues. It seems to work fine on both desktop and notebook.
The problem is I cannot get a bootable usb from the same image. I have tried several times using both unetbootin and imagewriter. Most common issue is “no live image found” but on 2 occasions did get image which gets about half way through boot process before hanging.
I would suggest you ether take a earlier (unbroken?) image and update using the factory-tested repository.
Or a newer one. But before that have a look at openQA.opensuse.org to see which image “KDE_LiveCD” most probably is not broken for usbboot like build 1056 = 11.4 RC1.