Installing midori makes error

[Jānis Kangarooo]

xubuntu@xubuntu:~$ sudo apt-get install midori
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  midori
0 upgraded, 1 newly installed, 0 to remove and 195 not upgraded.
Need to get 1,131 kB of archives.
After this operation, 3,490 kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu/ precise/universe midori i386 0.4.3-1ubuntu1 [1,131 kB]
Fetched 1,131 kB in 2s (436 kB/s)
Selecting previously unselected package midori.
(Reading database ... 135354 files and directories currently installed.)
Unpacking midori (from .../midori_0.4.3-1ubuntu1_i386.deb) ...
Processing triggers for desktop-file-utils ...
Processing triggers for hicolor-icon-theme ...
Processing triggers for man-db ...
Setting up midori (0.4.3-1ubuntu1) ...
rmdir: failed to remove `/etc/xdg/midori/extensions/libadblock.so': No such file or directory

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: midori 0.4.3-1ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic i686
ApportVersion: 2.0.1-0ubuntu12
Architecture: i386
CasperVersion: 1.315
Date: Sat Dec 1 22:35:00 2012
LiveMediaBuild: Xubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: midori
UpgradeStatus: No upgrade log present (probably fresh install)

[Daniel Letzeisen (dtl131)]

I reproduced it, but it does not affect the functioning of the program.