diff --git a/bin/composer b/bin/composer
index 304940f6d..597c7e4fd 100755
--- a/bin/composer
+++ b/bin/composer
@@ -10,6 +10,8 @@ use Composer\Downloader\ZipDownloader;
 use Composer\Command\InstallCommand;
 use Composer\Installer\LibraryInstaller;
 
+setlocale(LC_ALL, 'C');
+
 $composer = new Composer();
 $composer->addDownloader('git', new GitDownloader);
 $composer->addDownloader('pear', new PearDownloader);
diff --git a/src/Composer/Command/InstallCommand.php b/src/Composer/Command/InstallCommand.php
index e92994a46..368d03814 100644
--- a/src/Composer/Command/InstallCommand.php
+++ b/src/Composer/Command/InstallCommand.php
@@ -65,7 +65,7 @@ class InstallCommand
         // TODO there should be an update flag or dedicated update command
         // TODO check lock file to remove packages that disappeared from the requirements
         foreach ($config['require'] as $name => $version) {
-            $name = $this->lowercase($name);
+            $name = strtolower($name);
             if ('latest' === $version) {
                 $request->install($name);
             } else {
@@ -90,7 +90,7 @@ class InstallCommand
             switch ($task['job']) {
             case 'install':
                 $package = $task['package'];
-                echo '> Installing '.$package->getName().PHP_EOL;
+                echo '> Installing '.$package->getPrettyName().PHP_EOL;
                 if ($sourceInstall) {
                     // TODO
                 } else {
@@ -98,16 +98,16 @@ class InstallCommand
                         $downloaderType = $package->getDistType();
                         $type = 'dist';
                     } elseif ($package->getSourceType()) {
-                        echo 'Package '.$package->getName().' has no dist url, installing from source instead.';
+                        echo 'Package '.$package->getPrettyName().' has no dist url, installing from source instead.';
                         $downloaderType = $package->getSourceType();
                         $type = 'source';
                     } else {
-                        throw new \UnexpectedValueException('Package '.$package->getName().' has no source or dist URL.');
+                        throw new \UnexpectedValueException('Package '.$package->getPrettyName().' has no source or dist URL.');
                     }
                     $downloader = $composer->getDownloader($downloaderType);
                     $installer = $composer->getInstaller($package->getType());
                     if (!$installer->install($package, $downloader, $type)) {
-                        throw new \LogicException($package->getName().' could not be installed.');
+                        throw new \LogicException($package->getPrettyName().' could not be installed.');
                     }
                 }
                 $lock[$package->getName()] = array('version' => $package->getVersion());
@@ -158,12 +158,4 @@ class InstallCommand
         file_put_contents('composer.lock', json_encode($content, JSON_FORCE_OBJECT)."\n");
         echo '> composer.lock dumped'.PHP_EOL;
     }
-
-    protected function lowercase($str)
-    {
-        if (function_exists('mb_strtolower')) {
-            return mb_strtolower($str, 'UTF-8');
-        }
-        return strtolower($str, 'UTF-8');
-    }
 }
\ No newline at end of file
diff --git a/src/Composer/Package/BasePackage.php b/src/Composer/Package/BasePackage.php
index 37479476d..73afc1a79 100644
--- a/src/Composer/Package/BasePackage.php
+++ b/src/Composer/Package/BasePackage.php
@@ -24,6 +24,7 @@ use Composer\Repository\RepositoryInterface;
 abstract class BasePackage implements PackageInterface
 {
     protected $name;
+    protected $prettyName;
     protected $repository;
     protected $id;
 
@@ -34,14 +35,13 @@ abstract class BasePackage implements PackageInterface
      */
     public function __construct($name)
     {
+        $this->prettyName = $name;
         $this->name = strtolower($name);
         $this->id = -1;
     }
 
     /**
-     * Returns the package's name without version info, thus not a unique identifier
-     *
-     * @return string package name
+     * {@inheritDoc}
      */
     public function getName()
     {
@@ -49,12 +49,15 @@ abstract class BasePackage implements PackageInterface
     }
 
     /**
-     * Returns a set of names that could refer to this package
-     *
-     * No version or release type information should be included in any of the
-     * names. Provided or replaced package names need to be returned as well.
-     *
-     * @return array An array of strings referring to this package
+     * {@inheritDoc}
+     */
+    public function getPrettyName()
+    {
+        return $this->prettyName;
+    }
+
+    /**
+     * {@inheritDoc}
      */
     public function getNames()
     {
@@ -74,16 +77,16 @@ abstract class BasePackage implements PackageInterface
     }
 
     /**
-    * {@inheritDoc}
-    */
+     * {@inheritDoc}
+     */
     public function setId($id)
     {
         $this->id = $id;
     }
 
     /**
-    * {@inheritDoc}
-    */
+     * {@inheritDoc}
+     */
     public function getId()
     {
         return $this->id;
@@ -157,7 +160,7 @@ abstract class BasePackage implements PackageInterface
             'version' => $matches[1]
                 .(!empty($matches[2]) ? $matches[2] : '.0')
                 .(!empty($matches[3]) ? $matches[3] : '.0'),
-            'type' => strtolower(!empty($matches[4]) ? $matches[4] : 'stable'),
+            'type' => !empty($matches[4]) ? strtolower($matches[4]) : 'stable',
             'dev' => !empty($matches[5]),
         );
     }
diff --git a/src/Composer/Package/PackageInterface.php b/src/Composer/Package/PackageInterface.php
index f67213a9c..3fdefc78d 100644
--- a/src/Composer/Package/PackageInterface.php
+++ b/src/Composer/Package/PackageInterface.php
@@ -27,6 +27,13 @@ interface PackageInterface
      */
     function getName();
 
+    /**
+     * Returns the package's pretty (i.e. with proper case) name
+     *
+     * @return string package name
+     */
+    function getPrettyName();
+
     /**
      * Returns a set of names that could refer to this package
      *