Nokia-N800-26:~# apt-get upgrade
Reading package lists... Done
Building dependency tree... Done
The following packages will be upgraded:
  farsight0.1-transmitter-libjingle farsight0.1-transmitter-rawudp libfarsight0.1-0
3 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
Need to get 0B/68.0kB of archives.
After unpacking 73.7kB of additional disk space will be used.
Do you want to continue [Y/n]? y
WARNING: The following packages cannot be authenticated!
  farsight0.1-transmitter-libjingle farsight0.1-transmitter-rawudp libfarsight0.1-0
Install these packages without verification [y/N]? y
(Reading database ... 17837 files and directories currently installed.)
Preparing to replace farsight0.1-transmitter-libjingle 0.1.17-0osso9 (using .../farsight0.1-transmitter-libjingle_0.1.21-0osso1.8_armel.deb) ...
Unpacking replacement farsight0.1-transmitter-libjingle ...
dpkg: error processing /var/cache/apt/archives/farsight0.1-transmitter-libjingle_0.1.21-0osso1.8_armel.deb (--unpack):
 trying to overwrite `/usr/lib/farsight-0.1-2/libjingle-transmitter.so', which is also in package farsight0.1-2-transmitter-libjingle
Preparing to replace farsight0.1-transmitter-rawudp 0.1.17-0osso9 (using .../farsight0.1-transmitter-rawudp_0.1.21-0osso1.8_armel.deb) ...
Unpacking replacement farsight0.1-transmitter-rawudp ...
dpkg: error processing /var/cache/apt/archives/farsight0.1-transmitter-rawudp_0.1.21-0osso1.8_armel.deb (--unpack):
 trying to overwrite `/usr/lib/farsight-0.1-2/librawudp-transmitter.so', which is also in package farsight0.1-2-transmitter-rawudp
Preparing to replace libfarsight0.1-0 0.1.17-0osso9 (using .../libfarsight0.1-0_0.1.21-0osso1.8_armel.deb) ...
Unpacking replacement libfarsight0.1-0 ...
dpkg: error processing /var/cache/apt/archives/libfarsight0.1-0_0.1.21-0osso1.8_armel.deb (--unpack):
 trying to overwrite `/usr/lib/libfarsight-0.1.so.2.0.0', which is also in package libfarsight-0.1-2
Errors were encountered while processing:
 /var/cache/apt/archives/farsight0.1-transmitter-libjingle_0.1.21-0osso1.8_armel.deb
 /var/cache/apt/archives/farsight0.1-transmitter-rawudp_0.1.21-0osso1.8_armel.deb
 /var/cache/apt/archives/libfarsight0.1-0_0.1.21-0osso1.8_armel.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)