I'm using VirtualBox-4.1 beta 3 on Ubuntu 10.04, 32 bit. Within a vm, I'm trying to boot into clonezilla-live-1.2.8-46-i486.iso. With beta2, it works perfectly.
With beta3, I have to activate IO_APIC. Otherwise clonezilla exits to a login prompt after the first couple of screens.
What's strange is this: I tried to reproduce the original error message, so I deactivated IO_APIC again. Afterwards, it still works, no boot prompt. I'm sure it didn't work before. And I'm sure I only added IO_APIC for the VM and nothing else. So from a user standpoint, the VM is now configured exactly the same as at the beginning of my tests. Initially, Clonezilla exited into the login prompt, now it works. Strange, isn't it?