ssh-copy-id cannot handle spaces in usernames

If a username has a space in it, ssh-copy-id cannot handle it, unless it's in a non-obvious way. ssh itself has no problem with spaces.

$ ssh-copy-id "User name"@server
ssh: Could not resolve hostname User: Name or service not known
$ ssh-copy-id "User\ name"@server
ssh: Could not resolve hostname User\\: Name or service not known
$ ssh-copy-id User\ name@server
ssh: Could not resolve hostname User: Name or service not known

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: openssh-client 1:5.9p1-5ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-32.51-generic 3.2.30
Uname: Linux 3.2.0-32-generic x86_64
NonfreeKernelModules: fglrx wl
ApportVersion: 2.0.1-0ubuntu14
Architecture: amd64
Date: Sun Nov 4 02:34:02 2012
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions:
 ssh-askpass N/A
 libpam-ssh N/A
 keychain N/A
 ssh-askpass-gnome 1:5.9p1-5ubuntu1
SSHClientVersion: OpenSSH_5.9p1 Debian-5ubuntu1, OpenSSL 1.0.1 14 Mar 2012
SourcePackage: openssh
UpgradeStatus: No upgrade log present (probably fresh install)