diff --git a/base.php b/base.php
index 052febe7..7ab5a9ab 100644
--- a/base.php
+++ b/base.php
@@ -44,9 +44,11 @@ require CORE_PATH . 'Loader.php';
 if (is_file(ROOT_PATH . 'env' . EXT)) {
     $env = include ROOT_PATH . 'env' . EXT;
     foreach ($env as $key => $val) {
-        $name = ENV_PREFIX . $key;
+        $name = ENV_PREFIX . strtoupper($key);
         if (is_bool($val)) {
             $val = $val ? 1 : 0;
+        } elseif (!is_scalar($val)) {
+            continue;
         }
         putenv("$name=$val");
     }
diff --git a/library/think/App.php b/library/think/App.php
index 9865d1d3..f03c31f8 100644
--- a/library/think/App.php
+++ b/library/think/App.php
@@ -352,9 +352,12 @@ class App
             } else {
                 //重新申请一块比较大的buffer
                 if (ob_get_level() > 0) {
-                    ob_end_clean();
+                    $output = ob_get_clean();
                 }
                 ob_start();
+                if (!empty($output)) {
+                    echo $output;
+                }
             }
 
             // 应用命名空间
diff --git a/library/think/Config.php b/library/think/Config.php
index 330e57f1..105920b1 100644
--- a/library/think/Config.php
+++ b/library/think/Config.php
@@ -81,7 +81,7 @@ class Config
 
         if (!strpos($name, '.')) {
             // 判断环境变量
-            $result = getenv(ENV_PREFIX . $name);
+            $result = getenv(ENV_PREFIX . strtoupper($name));
             if (false !== $result) {
                 return $result;
             }
@@ -89,7 +89,7 @@ class Config
         } else {
             // 二维数组设置和获取支持
             $name   = explode('.', $name);
-            $result = getenv(ENV_PREFIX . $name[0] . '_' . $name[1]);
+            $result = getenv(ENV_PREFIX . strtoupper($name[0] . '_' . $name[1]));
             // 判断环境变量
             if (false !== $result) {
                 return $result;
@@ -113,7 +113,7 @@ class Config
         }
 
         if (!strpos($name, '.')) {
-            $result = getenv(ENV_PREFIX . $name);
+            $result = getenv(ENV_PREFIX . strtoupper($name));
             if (false !== $result) {
                 return $result;
             }
@@ -122,7 +122,7 @@ class Config
         } else {
             // 二维数组设置和获取支持
             $name   = explode('.', $name);
-            $result = getenv(ENV_PREFIX . $name[0] . '_' . $name[1]);
+            $result = getenv(ENV_PREFIX .  strtoupper($name[0] . '_' . $name[1]));
             // 判断环境变量
             if (false !== $result) {
                 return $result;
diff --git a/tpl/think_exception.tpl b/tpl/think_exception.tpl
index aabf82a8..a978f1de 100644
--- a/tpl/think_exception.tpl
+++ b/tpl/think_exception.tpl
@@ -83,11 +83,11 @@
     <meta name="robots" content="noindex,nofollow" />
     <style>
         /* Base */
-        body{
+        body {
             color: #333;
             font: 16px Verdana, "Helvetica Neue", helvetica, Arial, 'Microsoft YaHei', sans-serif;
             margin: 0px;
-            padding: 20px;
+            padding: 0 20px 20px;
         }
         h1{
             margin: 10px 0 0;
@@ -145,6 +145,9 @@
         }
     
         /* Exception Info */
+        .exception {
+            margin-top: 20px;
+        }
         .exception .message{
             padding: 12px;
             border: 1px solid #ddd;