diff --git a/src/Composer/Downloader/PearDownloader.php b/src/Composer/Downloader/PearDownloader.php
index 2bb1f9c72..bf1af7215 100644
--- a/src/Composer/Downloader/PearDownloader.php
+++ b/src/Composer/Downloader/PearDownloader.php
@@ -21,7 +21,10 @@ class PearDownloader extends FileDownloader
 {
     protected function extract($file, $path)
     {
-        system(sprintf('tar -zxf %s', escapeshellarg($file)));
+        $oldDir = getcwd();
+        chdir(dirname($file));
+        system(sprintf('tar -zxf %s', escapeshellarg(basename($file))));
+        chdir($oldDir);
         @unlink($path . '/package.sig');
         @unlink($path . '/package.xml');
     }
diff --git a/src/Composer/Repository/PearRepository.php b/src/Composer/Repository/PearRepository.php
index 1484b5b5b..7a8ebe5da 100644
--- a/src/Composer/Repository/PearRepository.php
+++ b/src/Composer/Repository/PearRepository.php
@@ -64,7 +64,14 @@ class PearRepository extends ArrayRepository
                 $packageLink = $package->getAttribute('xlink:href');
                 $releaseLink = $this->url . str_replace("/rest/p/", "/rest/r/", $packageLink);
                 $allReleasesLink = $releaseLink . "/allreleases2.xml";
-                $releasesXML = $this->requestXml($allReleasesLink);
+
+                try {
+                    $releasesXML = $this->requestXml($allReleasesLink);
+                } catch (\ErrorException $e) {
+                    if (strpos($e->getMessage(), '404')) {
+                        continue;
+                    }
+                }
 
                 $releases = $releasesXML->getElementsByTagName('r');
 
@@ -79,7 +86,14 @@ class PearRepository extends ArrayRepository
                         'version' => $pearVersion,
                     );
 
-                    $deps = file_get_contents($releaseLink . "/deps.".$pearVersion.".txt");
+                    try {
+                        $deps = file_get_contents($releaseLink . "/deps.".$pearVersion.".txt");
+                    } catch (\ErrorException $e) {
+                        if (strpos($e->getMessage(), '404')) {
+                            continue;
+                        }
+                    }
+
                     if (preg_match('((O:([0-9])+:"([^"]+)"))', $deps, $matches)) {
                         if (strlen($matches[3]) == $matches[2]) {
                             throw new \InvalidArgumentException("Invalid dependency data, it contains serialized objects.");
@@ -102,7 +116,11 @@ class PearRepository extends ArrayRepository
                         }
                     }
 
-                    $this->addPackage($loader->load($packageData));
+                    try {
+                        $this->addPackage($loader->load($packageData));
+                    } catch (\UnexpectedValueException $e) {
+                        continue;
+                    }
                 }
             }
         }