diff --git a/REVISION.md b/REVISION.md
index d6772e2..d202786 100644
--- a/REVISION.md
+++ b/REVISION.md
@@ -5,6 +5,12 @@ Revision history
 [![Build Status](https://scrutinizer-ci.com/g/mosbth/cimage/badges/build.png?b=master)](https://scrutinizer-ci.com/g/mosbth/cimage/build-status/master)
 
 
+v0.7.6* (2015-10-18)
+-------------------------------------
+
+* Add check for postprocessing tools in path in `webroot/check_system.php`, #104.
+
+
 v0.7.6 (2015-10-18)
 -------------------------------------
 
diff --git a/webroot/check_system.php b/webroot/check_system.php
index 6af2b68..fb6ea28 100644
--- a/webroot/check_system.php
+++ b/webroot/check_system.php
@@ -4,6 +4,12 @@ echo 'Current PHP version: ' . phpversion() . '<br><br>';
 
 echo 'Running on: ' . $_SERVER['SERVER_SOFTWARE'] . '<br><br>';
 
+$no = extension_loaded('exif') ? null : 'NOT';
+echo "Extension exif is $no loaded.<br>";
+
+$no = extension_loaded('curl') ? null : 'NOT';
+echo "Extension curl is $no loaded.<br>";
+
 $no = extension_loaded('gd') ? null : 'NOT';
 echo "Extension gd is $no loaded.<br>";
 
@@ -11,8 +17,13 @@ if (!$no) {
     echo "<pre>", var_dump(gd_info()), "</pre>";
 }
 
-$no = extension_loaded('exif') ? null : 'NOT';
-echo "Extension exif is $no loaded.<br>";
+echo "<strong>Checking path for postprocessing tools</strong>";
 
-$no = extension_loaded('curl') ? null : 'NOT';
-echo "Extension curl is $no loaded.<br>";
+echo "<br>optipng: ";
+system("which optipng");
+
+echo "<br>pngout: ";
+system("which pngout");
+
+echo "<br>jpegtran: ";
+system("which jpegtran");
diff --git a/webroot/img.php b/webroot/img.php
index 5ebf0de..d2509c6 100644
--- a/webroot/img.php
+++ b/webroot/img.php
@@ -8,7 +8,7 @@
  *
  */
 
-$version = "v0.7.6 (2015-10-18)";
+$version = "v0.7.6* (2015-10-18)";
 
 
 
diff --git a/webroot/img_config.php b/webroot/img_config.php
index 87ac152..4e3bc33 100644
--- a/webroot/img_config.php
+++ b/webroot/img_config.php
@@ -110,8 +110,7 @@ return array(
 
      /**
       * The name representing a dummy image which is automatically created
-      * and stored at the defined path. The dummy image can then be used
-      * inplace of an original image as a placeholder.
+      * and stored at the defined path.
       * The dummy_dir must be writable and it defaults to a subdir of the
       * cache directory.
       * Write protect the dummy_dir to prevent creation of new dummy images,