After upgrading to VirtualBox 4.1.0+ I can't use it anymore (completely). VirtualBox just stops it's execution at stage while it read bootblock of guest. Any guest OS is affected (*nix with grub, windows, ANY livecd). Log shows only resets (complete example in attached file). I used OSE version for years, but 4.1 is something insane. Nothing has changed before upgrade. Downgraded to 4.0.8, but I want to test and continue to use VirtualBox. Please help!