Bug confirmed for Oneiric too:

root@ip-10-64-61-11:/var/cache/apt/archives/partial# dpkg -I xserver-xorg-core_2%3a1.10.4-1ubuntu4.2_i386.deb
 new debian package, version 2.0.
 size 90230 bytes: control archive= 720 bytes.
     709 bytes,    18 lines      control              
     255 bytes,     3 lines      md5sums              
 Package: xserver-xorg-video-mach64
 Version: 6.9.0-1
 Architecture: i386
 Maintainer: Ubuntu Developers <email address hidden>
 Original-Maintainer: Debian X Strike Force <email address hidden>
 Installed-Size: 268
 Depends: libc6 (>= 2.4), xorg-video-abi-10, xserver-xorg-core (>= 2:1.10.0-0ubuntu1~)
 Provides: xorg-driver-video
 Section: x11
 Priority: optional
 Description: X.Org X server -- ATI Mach64 display driver
  This driver for the X.Org X server (see xserver-xorg for a further description)
  provides support for the ATI Mach64 series.
  .
  More information about X.Org can be found at:
  <URL:http://www.X.org>
  .
  This package is built from the X.org xf86-video-mach64 driver module.
root@ip-10-64-61-11:/var/cache/apt/archives/partial# 

root@ip-10-64-61-11:/var/cache/apt/archives/partial# dpkg -I xserver-xorg-video-mach64_6.9.0-1_i386.deb 
 new debian package, version 2.0.
 size 6706 bytes: control archive= 977 bytes.
    1206 bytes,    25 lines      control              
     217 bytes,     3 lines      md5sums              
 Package: xserver-xorg-video-ati
 Version: 1:6.14.99~git20110811.g93fc084-0ubuntu1
 Architecture: i386
 Maintainer: Ubuntu Developers <email address hidden>
 Installed-Size: 96
 Depends: libc6 (>= 2.1.3), libpciaccess0, xorg-video-abi-10, xserver-xorg-core (>= 2:1.10.0-0ubuntu1~), xserver-xorg-video-r128, xserver-xorg-video-mach64, xserver-xorg-video-radeon
 Provides: xorg-driver-video
 Section: x11
 Priority: optional
 Description: X.Org X server -- AMD/ATI display driver wrapper
  This package provides the 'ati' driver for the AMD/ATI Mach64, Rage128,
  Radeon, FireGL, FireMV, FirePro and FireStream series. This driver is
  actually a wrapper that loads one of the 'mach64', 'r128' or 'radeon'
  sub-drivers depending on the hardware.
  These sub-drivers are brought through package dependencies.
  .
  Users of Rage, Mach, or Radeon boards may remove this package only if
  they use Driver "r128", "mach64", or "radeon" in /etc/X11/xorg.conf
  instead of relying on autodetection.
  .
  More information about X.Org can be found at:
  <URL:http://www.X.org>
  .
  This package is built from the X.org xf86-video-ati driver module.
 Original-Maintainer: Debian X Strike Force <email address hidden>

root@ip-10-64-61-11:/var/cache/apt/archives/partial# dpkg -I xserver-xorg-video-ati_1%3a6.14.99~git20110811.g93fc084-0ubuntu1_i386.deb
 new debian package, version 2.0.
 size 12712 bytes: control archive= 785 bytes.
     793 bytes,    20 lines      control              
     316 bytes,     4 lines      md5sums              
 Package: xserver-xorg-video-fbdev
 Version: 1:0.4.2-3ubuntu6
 Architecture: i386
 Maintainer: Ubuntu Developers <email address hidden>
 Installed-Size: 96
 Depends: libc6 (>= 2.1.3), xorg-video-abi-10, xserver-xorg-core (>= 2:1.10.0-0ubuntu1~)
 Conflicts: xserver-xorg-driver-fbdev
 Replaces: xserver-xorg (<< 6.8.2-35), xserver-xorg-driver-fbdev
 Provides: xorg-driver-video, xserver-xorg-video-10
 Section: x11
 Priority: optional
 Description: X.Org X server -- fbdev display driver
  This package provides the driver for the Linux framebuffer device (aka
  'fbdev').
  .
  More information about X.Org can be found at:
  <URL:http://www.X.org>
  .
  This package is built from the X.org xf86-video-fbdev driver module.
 Original-Maintainer: Debian X Strike Force <email address hidden>