Adobe Flash 10 on Ubuntu with Chrome

I was trying to use Chromium on Ubuntu 10.04 Lucid Lynx, and Flash was working, but about:plugins revealed that it was version 9 whereas I wanted 10.

It turns out that all I had to do was delete ~/.mozilla/plugins/libflashplayer.so which was left over from long ago. I'd already enabled Adobe Flash 10 in the Ubuntu Software Manager, and once that file was gone, a restart of Chrome let it see the system Flash player.