It looks to me as if this has been fixed as of natty. At least, it seems to be working for me.
I am on a USA keyboard and layout. I added the 'United Kingdom' layout, and then used the keyboard layout switching keys (Shift+CapsLock in my case) to toggle to GBr. Then I did AltRight+4 and got €. ** Changed in: xkeyboard-config (Ubuntu) Status: Triaged => Fix Released -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xkeyboard-config in ubuntu. https://bugs.launchpad.net/bugs/254922 Title: can't type € (euro) symbol when using "right alt key" (altgr) as compose key in gnome _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp