Opera 9.61 for Ubuntu 8.10

I tried to install Opera 9.61 for Ubuntu 8.04 (Hardy Heron) on my Ubuntu 8.10 (Intrepid Ibex) machine but it didn't work.

Installing the version for Debian 4.0 (Etch), Debian Testing (Lenny) and Debian Unstable (Sid) did the trick.