Accents in URLs

Just came across this URL which opens in 'other' browsers but not in RISC
OS NetSurf here. Okay, I'll admit to using an old version (3.1 #1298)
but no doubt I'll be told if later versions do cope. ;-)

http://dahlström.net/svg/favicon/favicon.html

(which StronEd doesn't but Pluto translates to
http://dahlstr%F6m.net/svg/favicon/favicon.html)

tried this

http://dahlström.net/svg/favicon/favicon.html

and this

http://dahlström.net/svg/favicon/favicon.html

Without the umlaut it is a different web site. Daft, eh?

http://dahlstrom.net/svg/favicon/favicon.html