Virtualbox 3.1 Fails to attach Virtual IDE device

[B1ackcr0w]

Output of Terminal when running Testdrive (in Karmic 32b Generic Desktop)

  1. Ubuntu Desktop (lucid)
     +-cache--> [2009-12-14 08:12:39] lucid-desktop-i386.iso
  2. Ubuntu Server (lucid)
  3. Ubuntu Alternate (lucid)
  4. Ubuntu DVD (lucid)
  5. Ubuntu Netbook Remix (lucid)
  6. Other (prompt for ISO URL)

Select an ISO to testdrive: 1

WARNING: Your CPU's lack of VT will impact the performance of your VMs.
INFO: Using VirtualBox for virtual machine hosting...

INFO: Syncing the specified ISO...
      rsync://cdimage.ubuntu.com/cdimage/daily-live/current/lucid-desktop-i386.iso
receiving file list ...
1 file to consider

sent 120 bytes received 97 bytes 434.00 bytes/sec
total size is 720228352 speedup is 3319024.66

INFO: Creating disk image...
VirtualBox Command Line Management Interface Version 3.1.0
(C) 2005-2009 Sun Microsystems, Inc.
All rights reserved.

0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
Disk image created. UUID: d8ee7270-1c42-44ba-bddb-71711ad44d32

INFO: Running the Virtual Machine...
VirtualBox Command Line Management Interface Version 3.1.0
(C) 2005-2009 Sun Microsystems, Inc.
All rights reserved.

Virtual machine 'testdrive' is created and registered.
UUID: d1224727-e4d5-4e01-83e2-5ab62daa06a7
Settings file: '/root/.VirtualBox/Machines/testdrive/testdrive.xml'
VirtualBox Command Line Management Interface Version 3.1.0
(C) 2005-2009 Sun Microsystems, Inc.
All rights reserved.

VirtualBox Command Line Management Interface Version 3.1.0
(C) 2005-2009 Sun Microsystems, Inc.
All rights reserved.

ERROR: Could not find a storage controller named 'IDE Controller'
Details: code VBOX_E_OBJECT_NOT_FOUND (0x80bb0001), component Machine, interface IMachine, callee nsISupports
Context: "AttachDevice(Bstr("IDE Controller"), 0, 0, DeviceType_HardDisk, uuid)" at line 556 of file VBoxManageModifyVM.cpp

I'm not using OSE Virtual Box, using 3.1 PPA from Sun. I have two other VMs working fine on this installation.