Error reported to stdout instead of stderr

I just created a keyfile on a new machine by running euca-add-keypair and directing its output into a key file. The key didn't work, for no immediately clear reason. Turns out my keyfile now contains this text:

    KeyPairExists: Key pair '<...>' already exists.

Would have been nice if that could have gone to stderr where I was likely to see it!

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: euca2ools 2.0.2-1ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Uname: Linux 3.5.0-18-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu6
Architecture: i386
Date: Thu Nov 15 15:48:56 2012
InstallationDate: Installed on 2011-02-17 (636 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: euca2ools
UpgradeStatus: Upgraded to quantal on 2012-11-13 (2 days ago)