Устаревшие пакеты против потерянных пакетов

В чем разница между устаревшими и потерянными пакетами? Более конкретно, почему deborphan производит это:

dave@ubuntu:~$ deborphan
libbind9-80
libllvm3.1
libgrail5
libpython3.2
libsvga1
libarchive12
libdirectfb-1.2-9
gcalctool
liblwres80
libqpdf8
libkms1
libnux-3.0-0

... в то время как aptitude search '~o' производит это:

dave@ubuntu:~$ aptitude search '~o'
idA libarchive12                                 - Multi-format archive and compression library (shared li
i   libbind9-80                                  - BIND9 Shared Library used by BIND                      
i   libdns81                                     - DNS Shared Library used by BIND                        
i   libdrm-nouveau1a                             - Userspace interface to nouveau-specific kernel DRM serv
idA libgrail5                                    - Gesture Recognition And Instantiation Library          
i   libisc83                                     - ISC Shared Library used by BIND                        
i   libisccc80                                   - Command Channel Library used by BIND                   
i   libisccfg82                                  - Config File Handling Library used by BIND              
i   liblwres80                                   - Lightweight Resolver Library used by BIND              
idA libnux-3.0-0                                 - Visual rendering toolkit for real-time applications - s
idA libnux-3.0-common                            - Visual rendering toolkit for real-time applications - c
idA libpython3.2                                 - Shared Python runtime library (version 3.2)            
idA libqpdf8                                     - runtime library for PDF transformation/inspection softw
i   libudev0                                     - udev library                                           
i A linux-headers-3.5.0-27                       - Header files related to Linux kernel version 3.5.0     
i A linux-headers-3.5.0-27-generic               - Linux kernel headers for version 3.5.0 on 32 bit x86 SM
i   linux-image-3.5.0-27-generic                 - Linux kernel image for version 3.5.0 on 32 bit x86 SMP 
i   linux-image-extra-3.5.0-27-generic           - Linux kernel image for version 3.5.0 on 32 bit x86 SMP 
i   python3.2                                    - Interactive high-level object-oriented language (versio
i   python3.2-minimal                            - Minimal subset of the Python language (version 3.2)

Бонусный вопрос: apt-get autoremove еще больше другой. Почему?

dave@ubuntu:~$ sudo apt-get --purge autoremove
[sudo] password for dave: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED:
  gksu* libarchive12* libdirectfb-1.2-9* libgksu2-0* libgnome-menu2* libgrail5* libllvm3.1*
  libnux-3.0-0* libnux-3.0-common* libpython3.2* libqpdf8* libsvga1* libts-0.0-0* libx86-1*
  mobile-broadband-provider-info* python-imaging* python-imaging-compat* python-    oauth* tsconf*
0 upgraded, 0 newly installed, 19 to remove and 0 not upgraded.
After this operation, 33.8 MB disk space will be freed.
Do you want to continue [Y/n]? n
Abort.

В случае, если кто-то хочет знать, обновление до 13.04 подсказывает это.