diff --git a/application/ApplicationUtils.php b/application/ApplicationUtils.php
index 85dcbee..123cc0b 100644
--- a/application/ApplicationUtils.php
+++ b/application/ApplicationUtils.php
@@ -168,14 +168,15 @@ class ApplicationUtils
     public static function checkResourcePermissions($conf)
     {
         $errors = array();
+        $rainTplDir = rtrim($conf->get('resource.raintpl_tpl'), '/');
 
         // Check script and template directories are readable
         foreach (array(
             'application',
             'inc',
             'plugins',
-            $conf->get('resource.raintpl_tpl'),
-            $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme'),
+            $rainTplDir,
+            $rainTplDir.'/'.$conf->get('resource.theme'),
         ) as $path) {
             if (! is_readable(realpath($path))) {
                 $errors[] = '"'.$path.'" directory is not readable';
diff --git a/application/FileUtils.php b/application/FileUtils.php
index a167f64..918cb83 100644
--- a/application/FileUtils.php
+++ b/application/FileUtils.php
@@ -50,7 +50,8 @@ class FileUtils
 
     /**
      * Read data from a file containing Shaarli database format content.
-     * If the file isn't readable or doesn't exists, default data will be returned.
+     *
+     * If the file isn't readable or doesn't exist, default data will be returned.
      *
      * @param string $file    File path.
      * @param mixed  $default The default value to return if the file isn't readable.
@@ -61,16 +62,21 @@ class FileUtils
     {
         // Note that gzinflate is faster than gzuncompress.
         // See: http://www.php.net/manual/en/function.gzdeflate.php#96439
-        if (is_readable($file)) {
-            return unserialize(
-                gzinflate(
-                    base64_decode(
-                        substr(file_get_contents($file), strlen(self::$phpPrefix), -strlen(self::$phpSuffix))
-                    )
-                )
-            );
+        if (! is_readable($file)) {
+            return $default;
         }
 
-        return $default;
+        $data = file_get_contents($file);
+        if ($data == '') {
+            return $default;
+        }
+
+        return unserialize(
+            gzinflate(
+                base64_decode(
+                    substr($data, strlen(self::$phpPrefix), -strlen(self::$phpSuffix))
+                )
+            )
+        );
     }
 }
diff --git a/application/ThemeUtils.php b/application/ThemeUtils.php
index 2718ed1..16f2f6a 100644
--- a/application/ThemeUtils.php
+++ b/application/ThemeUtils.php
@@ -22,6 +22,7 @@ class ThemeUtils
      */
     public static function getThemes($tplDir)
     {
+        $tplDir = rtrim($tplDir, '/');
         $allTheme = glob($tplDir.'/*', GLOB_ONLYDIR);
         $themes = [];
         foreach ($allTheme as $value) {