diff --git a/src/Composer/Installer.php b/src/Composer/Installer.php
index 1ae72aed0..7d60e6030 100644
--- a/src/Composer/Installer.php
+++ b/src/Composer/Installer.php
@@ -543,16 +543,17 @@ class Installer
 
         foreach ($operations as $operation) {
             // collect suggestions
-            if ('install' === $operation->getJobType()) {
+            $jobType = $operation->getJobType();
+            if ('install' === $jobType) {
                 $this->suggestedPackagesReporter->addSuggestionsFromPackage($operation->getPackage());
             }
 
             // updating, force dev packages' references if they're in root package refs
             if ($this->update) {
                 $package = null;
-                if ('update' === $operation->getJobType()) {
+                if ('update' === $jobType) {
                     $package = $operation->getTargetPackage();
-                } elseif ('install' === $operation->getJobType()) {
+                } elseif ('install' === $jobType) {
                     $package = $operation->getPackage();
                 }
                 if ($package && $package->isDev()) {
@@ -561,20 +562,24 @@ class Installer
                         $this->updateInstallReferences($package, $references[$package->getName()]);
                     }
                 }
-                if ('update' === $operation->getJobType()
-                    && $operation->getTargetPackage()->isDev()
-                    && $operation->getTargetPackage()->getVersion() === $operation->getInitialPackage()->getVersion()
-                    && (!$operation->getTargetPackage()->getSourceReference() || $operation->getTargetPackage()->getSourceReference() === $operation->getInitialPackage()->getSourceReference())
-                    && (!$operation->getTargetPackage()->getDistReference() || $operation->getTargetPackage()->getDistReference() === $operation->getInitialPackage()->getDistReference())
-                ) {
-                    $this->io->writeError('  - Skipping update of '. $operation->getTargetPackage()->getPrettyName().' to the same reference-locked version', true, IOInterface::DEBUG);
-                    $this->io->writeError('', true, IOInterface::DEBUG);
+                if ('update' === $jobType) {
+                    $targetPackage = $operation->getTargetPackage();
+                    if ($targetPackage->isDev()) {
+                        $initialPackage = $operation->getInitialPackage();
+                        if ($targetPackage->getVersion() === $initialPackage->getVersion()
+                            && (!$targetPackage->getSourceReference() || $targetPackage->getSourceReference() === $initialPackage->getSourceReference())
+                            && (!$targetPackage->getDistReference() || $targetPackage->getDistReference() === $initialPackage->getDistReference())
+                        ) {
+                            $this->io->writeError('  - Skipping update of ' . $targetPackage->getPrettyName() . ' to the same reference-locked version', true, IOInterface::DEBUG);
+                            $this->io->writeError('', true, IOInterface::DEBUG);
 
-                    continue;
+                            continue;
+                        }
+                    }
                 }
             }
 
-            $event = 'Composer\Installer\PackageEvents::PRE_PACKAGE_'.strtoupper($operation->getJobType());
+            $event = 'Composer\Installer\PackageEvents::PRE_PACKAGE_'.strtoupper($jobType);
             if (defined($event) && $this->runScripts) {
                 $this->eventDispatcher->dispatchPackageEvent(constant($event), $this->devMode, $policy, $pool, $installedRepo, $request, $operations, $operation);
             }
@@ -589,7 +594,7 @@ class Installer
             $this->installationManager->execute($localRepo, $operation);
 
             // output reasons why the operation was ran, only for install/update operations
-            if ($this->verbose && $this->io->isVeryVerbose() && in_array($operation->getJobType(), array('install', 'update'))) {
+            if ($this->verbose && $this->io->isVeryVerbose() && in_array($jobType, array('install', 'update'))) {
                 $reason = $operation->getReason();
                 if ($reason instanceof Rule) {
                     switch ($reason->getReason()) {
@@ -605,7 +610,7 @@ class Installer
                 }
             }
 
-            $event = 'Composer\Installer\PackageEvents::POST_PACKAGE_'.strtoupper($operation->getJobType());
+            $event = 'Composer\Installer\PackageEvents::POST_PACKAGE_'.strtoupper($jobType);
             if (defined($event) && $this->runScripts) {
                 $this->eventDispatcher->dispatchPackageEvent(constant($event), $this->devMode, $policy, $pool, $installedRepo, $request, $operations, $operation);
             }
diff --git a/src/Composer/Package/Archiver/ArchiveManager.php b/src/Composer/Package/Archiver/ArchiveManager.php
index 35a3d3467..35ff6f600 100644
--- a/src/Composer/Package/Archiver/ArchiveManager.php
+++ b/src/Composer/Package/Archiver/ArchiveManager.php
@@ -75,9 +75,9 @@ class ArchiveManager
         $nameParts = array(preg_replace('#[^a-z0-9-_]#i', '-', $package->getName()));
 
         if (preg_match('{^[a-f0-9]{40}$}', $package->getDistReference())) {
-            $nameParts = array_merge($nameParts, array($package->getDistReference(), $package->getDistType()));
+            array_push($nameParts, $package->getDistReference(), $package->getDistType());
         } else {
-            $nameParts = array_merge($nameParts, array($package->getPrettyVersion(), $package->getDistReference()));
+            array_push($nameParts, $package->getPrettyVersion(), $package->getDistReference());
         }
 
         if ($package->getSourceReference()) {
@@ -144,7 +144,7 @@ class ArchiveManager
             $sourcePath = realpath('.');
         } else {
             // Directory used to download the sources
-            $sourcePath = sys_get_temp_dir().'/composer_archive'.uniqid();
+            $sourcePath = sys_get_temp_dir().'/composer_archive'.uniqid('', true);
             $filesystem->ensureDirectoryExists($sourcePath);
 
             // Download sources
@@ -161,7 +161,7 @@ class ArchiveManager
         }
 
         // Create the archive
-        $tempTarget = sys_get_temp_dir().'/composer_archive'.uniqid().'.'.$format;
+        $tempTarget = sys_get_temp_dir().'/composer_archive'.uniqid('', true).'.'.$format;
         $filesystem->ensureDirectoryExists(dirname($tempTarget));
 
         $archivePath = $usableArchiver->archive($sourcePath, $tempTarget, $format, $package->getArchiveExcludes(), $ignoreFilters);
diff --git a/src/Composer/Util/Git.php b/src/Composer/Util/Git.php
index a5fa87982..86da5bdf0 100644
--- a/src/Composer/Util/Git.php
+++ b/src/Composer/Util/Git.php
@@ -245,7 +245,7 @@ class Git
 
     private function isAuthenticationFailure($url, &$match)
     {
-        if (!preg_match('{(https?://)([^/]+)(.*)$}i', $url, $match)) {
+        if (!preg_match('{^(https?://)([^/]+)(.*)$}i', $url, $match)) {
             return false;
         }
 
@@ -257,8 +257,9 @@ class Git
             'fatal: could not read Username',
         );
 
+        $errorOutput = $this->process->getErrorOutput();
         foreach ($authFailures as $authFailure) {
-            if (strpos($this->process->getErrorOutput(), $authFailure) !== false) {
+            if (strpos($errorOutput, $authFailure) !== false) {
                 return true;
             }
         }