diff --git a/libs/modelParser.js b/libs/modelParser.js
index ca24cc5d1..0a67f21d0 100644
--- a/libs/modelParser.js
+++ b/libs/modelParser.js
@@ -221,12 +221,22 @@ var parseScript = function (aScript) {
   var supportURL = null;
   var contributionURL = null;
 
+  var updateURL = null;
+  var updateUtf = null;
   var downloadURL = null;
   var downloadUtf = null;
   var rAnyLocalScriptUrl = new RegExp(
     '^' + patternHasSameOrigin +
       '/(?:install|src/scripts)/(.+?)/(.+?)((?:\.min)?(?:\.user)?\.js)$'
   );
+  var rAnyLocalMetaUrl = new RegExp(
+    '^' + patternHasSameOrigin +
+      '/(?:meta|install|src/scripts)/(.+?)/(.+?)\.meta\.js$'
+  );
+
+  var rSameOrigin =  new RegExp(
+    '^' + patternHasSameOrigin
+  );
 
   // Temporaries
 
@@ -317,7 +327,7 @@ var parseScript = function (aScript) {
   // OpenUserJS metadata block checks
   if (findMeta(script.meta, 'OpenUserJS.unstableMinify.0.value')) {
     script.hasUnstableMinify = true;
-    script.showMinficationNotices = true;
+    script.showSourceNotices = true;
   }
 
   //
@@ -431,6 +441,54 @@ var parseScript = function (aScript) {
     script.isUpdated = true;
   }
 
+  // Update Url
+  if (process.env.FORCE_BUSY_UPDATEURL_CHECK === 'true') {
+    // `@updateURL` must be exact here for OUJS hosted checks
+    //   e.g. no `search`, no `hash`
+
+    updateURL = findMeta(script.meta, 'UserScript.updateURL.0.value');
+    if (updateURL) {
+      // Check for decoding error
+      try {
+        updateUtf = decodeURIComponent(updateURL);
+
+      } catch (aE) {
+        script.hasInvalidUpdateURL = true;
+        script.showSourceNotices = true;
+
+      } finally {
+        if (!script.hasInvalidUpdateURL)  {
+
+          // Validate `author` and `name` (installNameBase) to this scripts meta only
+          matches = updateUtf.match(rAnyLocalMetaUrl);
+          if (matches) {
+            if (script.authorSlug.toLowerCase() + '/' + script.nameSlug === matches[1].toLowerCase() + '/' + matches[2])
+            {
+              // Same script
+            } else {
+              script.hasInvalidUpdateURL = true;
+              script.showSourceNotices = true;
+            }
+          } else {
+            // Allow offsite checks
+            updateURL = new URL(updateURL);
+            if (rSameOrigin.test(updateURL.origin)) {
+              script.hasInvalidUpdateURL = true;
+              script.showSourceNotices = true;
+
+            }
+          }
+        }
+      }
+    } else {
+      if (!script.isLib) {
+        // Don't serve the script anywhere in this mode and if absent
+        script.hasInvalidUpdateURL = true;
+        script.showSourceNotices = true;
+      }
+    }
+  }
+
   // Download Url
   downloadURL = findMeta(script.meta, 'UserScript.downloadURL.0.value');
   if (downloadURL) {
@@ -439,7 +497,7 @@ var parseScript = function (aScript) {
 
     } catch (aE) {
       script.hasInvalidDownloadURL = true;
-      script.showMinficationNotices = true;
+      script.showSourceNotices = true;
 
     } finally {
       if (!script.hasInvalidDownloadURL)  {
@@ -451,15 +509,15 @@ var parseScript = function (aScript) {
               // Same script
             } else {
               script.hasAlternateDownloadURL = true;
-              script.showMinficationNotices = true;
+              script.showSourceNotices = true;
             }
           } else {
             script.hasAlternateDownloadURL = true;
-            script.showMinficationNotices = true;
+            script.showSourceNotices = true;
           }
         } else {
           script.hasAlternateDownloadURL = true;
-          script.showMinficationNotices = true;
+          script.showSourceNotices = true;
         }
       }
     }
diff --git a/views/includes/scriptList.html b/views/includes/scriptList.html
index bf24391aa..c2f46e150 100644
--- a/views/includes/scriptList.html
+++ b/views/includes/scriptList.html
@@ -14,6 +14,7 @@
     {{#scriptList}}
     <tr class="tr-link">
       <td>
+        {{#showSourceNotices}}<span class="pull-right"><i class="fa fa-fw fa-exclamation-triangle" title="Source Code notices"></i></span>{{/showSourceNotices}}
         {{#_issueCount}}<span class="pull-right"><a href="{{{scriptIssuesPageUri}}}/open" title="Open issue discussions"><i class="fa fa-fw fa-commenting"></i>{{_issueCount}}</a></span>{{/_issueCount}}
         <span class="script-icon hidden-xs" {{#icon16Url}}data-icon-src="{{{icon16Url}}}" data-icon-size="16"{{/icon16Url}}>
           {{#isLib}}<i class="fa fa-fw fa-file-excel-o"></i>{{/isLib}}{{^isLib}}<i class="fa fa-fw fa-file-code-o"></i>{{/isLib}}
diff --git a/views/includes/scriptPageHeader.html b/views/includes/scriptPageHeader.html
index 15a4e9c34..7235d4ace 100644
--- a/views/includes/scriptPageHeader.html
+++ b/views/includes/scriptPageHeader.html
@@ -2,21 +2,21 @@ <h2 class="page-heading">
   {{#isScriptPage}}
     {{^script.isLib}}
     <div class="btn-group pull-right">
-      <a href="{{{script.scriptInstallPageUrl}}}" class="btn btn-info">
+      <a href="{{{script.scriptInstallPageUrl}}}" class="btn btn-{{^script.showSourceNotices}}info{{/script.showSourceNotices}}{{#script.showSourceNotices}}warning{{/script.showSourceNotices}}">
         <i class="fa fa-download"></i> Install
       </a>
-      <button type="button" class="btn btn-info dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+      <button type="button" class="btn btn-{{^script.showSourceNotices}}info{{/script.showSourceNotices}}{{#script.showSourceNotices}}warning{{/script.showSourceNotices}} dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
         <span class="caret"></span>
         <span class="sr-only">Toggle Dropdown</span>
       </button>
       <ul class="dropdown-menu dropdown-menu-right">
         <li>
           <div class="btn-group btn-group-justified">
-            <a href="{{{script.scriptInstallPageXUrl}}}.min.user.js" class="btn btn-{{#script.showMinficationNotices}}warning{{/script.showMinficationNotices}}{{^script.showMinficationNotices}}primary{{/script.showMinficationNotices}}" title="EXPERIMENTAL INSTALLATION FORKING"><i class="fa fa-fw fa-download"></i> Install {{#script.hasAlternateDownloadURL}}once {{/script.hasAlternateDownloadURL}} with minification</a>
+            <a href="{{{script.scriptInstallPageXUrl}}}.min.user.js" class="btn btn-{{#script.showSourceNotices}}warning{{/script.showSourceNotices}}{{^script.showSourceNotices}}info{{/script.showSourceNotices}}" title="EXPERIMENTAL INSTALLATION FORKING"><i class="fa fa-fw fa-download"></i> Install {{#script.hasAlternateDownloadURL}}once {{/script.hasAlternateDownloadURL}} with minification</a>
           </div>
-          {{#script.showMinficationNotices}}
-          {{> includes/scriptPageHeaderMinificationNotices.html }}
-          {{/script.showMinficationNotices}}
+          {{#script.showSourceNotices}}
+          {{> includes/scriptPageHeaderSourceNotices.html }}
+          {{/script.showSourceNotices}}
         </li>
         <li role="separator" class="divider"></li>
         <li><a href="/about/Userscript-Beginners-HOWTO"><em class="fa fa-fw fa-question-circle"></em> Userscript Beginners HOWTO</a></li>
@@ -26,21 +26,21 @@ <h2 class="page-heading">
   {{/isScriptPage}}
   {{#isScriptViewSourcePage}}
     <div class="btn-group pull-right">
-      <a href="{{{script.scriptRawPageUrl}}}" class="btn btn-info">
+      <a href="{{{script.scriptRawPageUrl}}}" class="btn btn-{{^script.showSourceNotices}}info{{/script.showSourceNotices}}{{#script.showSourceNotices}}warning{{/script.showSourceNotices}}">
         <i class="fa fa-file-{{#script.isLib}}excel{{/script.isLib}}{{^script.isLib}}code{{/script.isLib}}-o"></i> Raw Source
       </a>
-      <button type="button" class="btn btn-info dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+      <button type="button" class="btn btn-{{^script.showSourceNotices}}info{{/script.showSourceNotices}}{{#script.showSourceNotices}}warning{{/script.showSourceNotices}} dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
         <span class="caret"></span>
         <span class="sr-only">Toggle Dropdown</span>
       </button>
       <ul class="dropdown-menu dropdown-menu-right">
         <li>
           <div class="btn-group btn-group-justified">
-            <a href="{{{script.scriptRawPageXUrl}}}" class="btn btn-{{#script.showMinficationNotices}}warning{{/script.showMinficationNotices}}{{^script.showMinficationNotices}}primary{{/script.showMinficationNotices}}" title="EXPERIMENTAL"><i class="fa fa-file-{{#script.isLib}}excel{{/script.isLib}}{{^script.isLib}}code{{/script.isLib}}-o"></i> Minified Source</a>
+            <a href="{{{script.scriptRawPageXUrl}}}" class="btn btn-{{#script.showSourceNotices}}warning{{/script.showSourceNotices}}{{^script.showSourceNotices}}info{{/script.showSourceNotices}}" title="EXPERIMENTAL"><i class="fa fa-file-{{#script.isLib}}excel{{/script.isLib}}{{^script.isLib}}code{{/script.isLib}}-o"></i> Minified Source</a>
           </div>
-          {{#script.showMinficationNotices}}
-          {{> includes/scriptPageHeaderMinificationNotices.html }}
-          {{/script.showMinficationNotices}}
+          {{#script.showSourceNotices}}
+          {{> includes/scriptPageHeaderSourceNotices.html }}
+          {{/script.showSourceNotices}}
         </li>
       </ul>
     </div>
diff --git a/views/includes/scriptPageHeaderMinificationNotices.html b/views/includes/scriptPageHeaderSourceNotices.html
similarity index 75%
rename from views/includes/scriptPageHeaderMinificationNotices.html
rename to views/includes/scriptPageHeaderSourceNotices.html
index 6f95511a7..27f529536 100644
--- a/views/includes/scriptPageHeaderMinificationNotices.html
+++ b/views/includes/scriptPageHeaderSourceNotices.html
@@ -1,7 +1,12 @@
 <div class="alert alert-warning" role="alert">
+  {{#script.hasInvalidUpdateURL}}
+    <p>
+      <i class="fa fa-fw fa-exclamation-triangle"></i> Invalid update target
+    </p>
+  {{/script.hasInvalidUpdateURL}}
   {{#script.hasInvalidDownloadURL}}
     <p>
-      <i class="fa fa-fw fa-exclamation"></i> Invalid download target
+      <i class="fa fa-fw fa-exclamation-triangle"></i> Invalid download target
     </p>
   {{/script.hasInvalidDownloadURL}}
   {{#script.hasUnstableMinify}}
diff --git a/views/pages/scriptPage.html b/views/pages/scriptPage.html
index 99fe4bb71..b9571e0b3 100644
--- a/views/pages/scriptPage.html
+++ b/views/pages/scriptPage.html
@@ -18,7 +18,7 @@
               <div class="input-group col-xs-12">
                 <span class="input-group-btn">
                   <button class="btn btn-info" id="require-raw" data-clipboard-text="// @require {{{script.scriptPermalinkInstallPageUrl}}}" title="Copy key and raw URL to clipboard"><i class="octicon octicon-clippy"></i> // @require</button>
-                  <button class="btn btn-warning" id="require-min" data-clipboard-text="// @require {{{script.scriptPermalinkInstallPageXUrl}}}.min.js" title="EXPERIMENTAL: Copy key and minified URL to clipboard"><i class="octicon octicon-clippy"></i></button>
+                  <button class="btn btn-info" id="require-min" data-clipboard-text="// @require {{{script.scriptPermalinkInstallPageXUrl}}}.min.js" title="EXPERIMENTAL: Copy key and minified URL to clipboard"><i class="octicon octicon-clippy"></i></button>
                 </span>
                 <input type="text" class="form-control" id="require" value="{{{script.scriptPermalinkInstallPageUrl}}}" readonly="readonly">
               </div>