I have also came across that error message upon updating Ubuntu natty with the terminal today:
Setting up software-center (3.1.23.2) ...
Updating software catalog...this may take a moment.
2011-03-11 14:41:40,854 - softwarecenter.db.update - WARNING - The file: '/usr/share/app-install/desktop/gnome-do.desktop' could not be read correctly. The application associated with this file will not be included in the software catalog. Please consider raising a bug report for this issue with the maintainer of that application
Software catalog update was successful.
Setting up system-config-printer-common (1.3.1+20110222-0ubuntu5) ...
Setting up system-config-printer-gnome (1.3.1+20110222-0ubuntu5) ...
Setting up system-config-printer-udev (1.3.1+20110222-0ubuntu5) ...
Setting up udisks (1.0.2-4) ...
Setting up indicator-sound (0.6.3-0ubuntu1) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
Processing triggers for python-support ...
Processing triggers for python-central ...
I have also came across that error message upon updating Ubuntu natty with the terminal today:
Setting up software-center (3.1.23.2) ... db.update - WARNING - The file: '/usr/share/ app-install/ desktop/ gnome-do. desktop' could not be read correctly. The application associated with this file will not be included in the software catalog. Please consider raising a bug report for this issue with the maintainer of that application config- printer- common (1.3.1+ 20110222- 0ubuntu5) ... config- printer- gnome (1.3.1+ 20110222- 0ubuntu5) ... config- printer- udev (1.3.1+ 20110222- 0ubuntu5) ...
Updating software catalog...this may take a moment.
2011-03-11 14:41:40,854 - softwarecenter.
Software catalog update was successful.
Setting up system-
Setting up system-
Setting up system-
Setting up udisks (1.0.2-4) ...
Setting up indicator-sound (0.6.3-0ubuntu1) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
Processing triggers for python-support ...
Processing triggers for python-central ...