Installer sets incorrect locale

Binary package hint: ubiquity

I've been able to replicate on several computers and several installation mediums, even though I choose Detroit, MI (I've also tried the default detected New York), my locale is set to en_CA, and my apt mirror is set to ca.archive.ubuntu.com.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Tue May 3 20:19:02 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)