Deb thumbnailer places the respective application icon over the standard .deb icon, as demonstrated below, providing that the .deb file itself contains the application icon.
Install Deb thumbnailer in Ubuntu 10.04/9.10
Open the terminal and run the following commands
sudo add-apt-repository ppa:deb-thumbnailer-team/ppa
sudo apt-get update
sudo aptitude install deb-thumbnailer
Screenshot
I have instaleed, the “special” icons get the doubled size than the normal one. I wanna uninstall it, I´ve tried by the synaptic, but the icons stills big one !