And here's the complete content of dpkg.log for the update - it will tell you exactly what was happening at the time the screenshots were taken, by comparing with the clock in the top-right of the screenshots):

  2006-02-14 17:21:26 upgrade initramfs-tools 0.40ubuntu21 0.40ubuntu22
  2006-02-14 17:21:26 status half-configured initramfs-tools 0.40ubuntu21
  2006-02-14 17:21:26 status unpacked initramfs-tools 0.40ubuntu21
  2006-02-14 17:21:26 status half-installed initramfs-tools 0.40ubuntu21
  2006-02-14 17:21:27 status half-installed initramfs-tools 0.40ubuntu21
  2006-02-14 17:21:27 status unpacked initramfs-tools 0.40ubuntu22
  2006-02-14 17:21:27 status unpacked initramfs-tools 0.40ubuntu22
  2006-02-14 17:21:27 upgrade libgstreamer-gconf0.8-0 0.8.11-6ubuntu1 0.8.12-1ubuntu1
  2006-02-14 17:21:27 status half-configured libgstreamer-gconf0.8-0 0.8.11-6ubuntu1
  2006-02-14 17:21:28 status unpacked libgstreamer-gconf0.8-0 0.8.11-6ubuntu1
  2006-02-14 17:21:28 status half-installed libgstreamer-gconf0.8-0 0.8.11-6ubuntu1
  2006-02-14 17:21:29 status half-installed libgstreamer-gconf0.8-0 0.8.11-6ubuntu1
  2006-02-14 17:21:29 status unpacked libgstreamer-gconf0.8-0 0.8.12-1ubuntu1
  2006-02-14 17:21:29 status unpacked libgstreamer-gconf0.8-0 0.8.12-1ubuntu1
  2006-02-14 17:21:29 upgrade libgstreamer-plugins0.8-0 0.8.11-6ubuntu1 0.8.12-1ubuntu1
  2006-02-14 17:21:29 status half-configured libgstreamer-plugins0.8-0 0.8.11-6ubuntu1
  2006-02-14 17:21:29 status unpacked libgstreamer-plugins0.8-0 0.8.11-6ubuntu1
  2006-02-14 17:21:29 status half-installed libgstreamer-plugins0.8-0 0.8.11-6ubuntu1
  2006-02-14 17:21:29 status half-installed libgstreamer-plugins0.8-0 0.8.11-6ubuntu1
  2006-02-14 17:21:30 status unpacked libgstreamer-plugins0.8-0 0.8.12-1ubuntu1
  2006-02-14 17:21:30 status unpacked libgstreamer-plugins0.8-0 0.8.12-1ubuntu1
  2006-02-14 17:21:30 upgrade gstreamer0.8-misc 0.8.11-6ubuntu1 0.8.12-1ubuntu1
  2006-02-14 17:21:30 status half-configured gstreamer0.8-misc 0.8.11-6ubuntu1
  2006-02-14 17:21:30 status unpacked gstreamer0.8-misc 0.8.11-6ubuntu1
  2006-02-14 17:21:30 status half-installed gstreamer0.8-misc 0.8.11-6ubuntu1
  2006-02-14 17:21:30 status half-installed gstreamer0.8-misc 0.8.11-6ubuntu1
  2006-02-14 17:21:31 status unpacked gstreamer0.8-misc 0.8.12-1ubuntu1
  2006-02-14 17:21:31 status unpacked gstreamer0.8-misc 0.8.12-1ubuntu1
  2006-02-14 17:21:32 upgrade gstreamer0.8-vorbis 0.8.11-6ubuntu1 0.8.12-1ubuntu1
  2006-02-14 17:21:32 status half-configured gstreamer0.8-vorbis 0.8.11-6ubuntu1
  2006-02-14 17:21:32 status unpacked gstreamer0.8-vorbis 0.8.11-6ubuntu1
  2006-02-14 17:21:32 status half-installed gstreamer0.8-vorbis 0.8.11-6ubuntu1
  2006-02-14 17:21:32 status half-installed gstreamer0.8-vorbis 0.8.11-6ubuntu1
  2006-02-14 17:21:32 status unpacked gstreamer0.8-vorbis 0.8.12-1ubuntu1
  2006-02-14 17:21:32 status unpacked gstreamer0.8-vorbis 0.8.12-1ubuntu1
  2006-02-14 17:21:32 upgrade gthumb 3:2.7.2-0ubuntu3 3:2.7.3-0ubuntu1
  2006-02-14 17:21:32 status half-configured gthumb 3:2.7.2-0ubuntu3
  2006-02-14 17:21:44 status unpacked gthumb 3:2.7.2-0ubuntu3
  2006-02-14 17:21:46 status half-installed gthumb 3:2.7.2-0ubuntu3
  2006-02-14 17:21:49 status half-installed gthumb 3:2.7.2-0ubuntu3
  2006-02-14 17:21:50 status unpacked gthumb 3:2.7.3-0ubuntu1
  2006-02-14 17:21:51 status unpacked gthumb 3:2.7.3-0ubuntu1
  2006-02-14 17:21:51 upgrade libmetacity0 1:2.13.55-0ubuntu1 1:2.13.89-0ubuntu1
  2006-02-14 17:21:51 status half-configured libmetacity0 1:2.13.55-0ubuntu1
  2006-02-14 17:21:51 status unpacked libmetacity0 1:2.13.55-0ubuntu1
  2006-02-14 17:21:51 status half-installed libmetacity0 1:2.13.55-0ubuntu1
  2006-02-14 17:21:51 status half-installed libmetacity0 1:2.13.55-0ubuntu1
  2006-02-14 17:21:51 status unpacked libmetacity0 1:2.13.89-0ubuntu1
  2006-02-14 17:21:51 status unpacked libmetacity0 1:2.13.89-0ubuntu1
  2006-02-14 17:21:51 upgrade metacity 1:2.13.55-0ubuntu1 1:2.13.89-0ubuntu1
  2006-02-14 17:21:51 status half-configured metacity 1:2.13.55-0ubuntu1
  2006-02-14 17:22:08 status unpacked metacity 1:2.13.55-0ubuntu1
  2006-02-14 17:22:10 status half-installed metacity 1:2.13.55-0ubuntu1
  2006-02-14 17:22:11 status half-installed metacity 1:2.13.55-0ubuntu1
  2006-02-14 17:22:12 status unpacked metacity 1:2.13.89-0ubuntu1
  2006-02-14 17:22:12 status unpacked metacity 1:2.13.89-0ubuntu1
  2006-02-14 17:22:13 status unpacked initramfs-tools 0.40ubuntu22
  2006-02-14 17:22:14 status unpacked initramfs-tools 0.40ubuntu22
  2006-02-14 17:22:14 status half-configured initramfs-tools 0.40ubuntu22
  2006-02-14 17:22:41 status installed initramfs-tools 0.40ubuntu22
  2006-02-14 17:22:42 status unpacked libgstreamer-gconf0.8-0 0.8.12-1ubuntu1
  2006-02-14 17:22:42 status half-configured libgstreamer-gconf0.8-0 0.8.12-1ubuntu1
  2006-02-14 17:23:06 status installed libgstreamer-gconf0.8-0 0.8.12-1ubuntu1
  2006-02-14 17:23:06 status unpacked libgstreamer-plugins0.8-0 0.8.12-1ubuntu1
  2006-02-14 17:23:07 status half-configured libgstreamer-plugins0.8-0 0.8.12-1ubuntu1
  2006-02-14 17:23:14 status installed libgstreamer-plugins0.8-0 0.8.12-1ubuntu1
  2006-02-14 17:23:14 status unpacked gstreamer0.8-misc 0.8.12-1ubuntu1
  2006-02-14 17:23:14 status half-configured gstreamer0.8-misc 0.8.12-1ubuntu1
  2006-02-14 17:23:16 status installed gstreamer0.8-misc 0.8.12-1ubuntu1
  2006-02-14 17:23:16 status unpacked gstreamer0.8-vorbis 0.8.12-1ubuntu1
  2006-02-14 17:23:16 status half-configured gstreamer0.8-vorbis 0.8.12-1ubuntu1
  2006-02-14 17:23:17 status installed gstreamer0.8-vorbis 0.8.12-1ubuntu1
  2006-02-14 17:23:18 status unpacked gthumb 3:2.7.3-0ubuntu1
  2006-02-14 17:23:18 status half-configured gthumb 3:2.7.3-0ubuntu1
  2006-02-14 17:23:34 status installed gthumb 3:2.7.3-0ubuntu1
  2006-02-14 17:23:36 status unpacked libmetacity0 1:2.13.89-0ubuntu1
  2006-02-14 17:23:36 status half-configured libmetacity0 1:2.13.89-0ubuntu1
  2006-02-14 17:23:37 status installed libmetacity0 1:2.13.89-0ubuntu1
  2006-02-14 17:23:37 status unpacked metacity 1:2.13.89-0ubuntu1
  2006-02-14 17:23:37 status half-configured metacity 1:2.13.89-0ubuntu1
  2006-02-14 17:23:48 status installed metacity 1:2.13.89-0ubuntu1