Schedule Main.addStyle before something breaks. Otherwise the options are 'hidden' at the bottom of the page.

4chan_x.user.js

@@ -3576,6 +3576,10 @@
           return;
       }
       $.ready(options.init);
+      if (conf['Quick Reply'] && conf['Hide Original Post Form']) {
+        Main.css += 'form[name=post] { display: none; }';
+      }
+      Main.addStyle();
       now = Date.now();
       if (conf['Check for Updates'] && $.get('lastUpdate', 0) < now - 6 * HOUR) {
         $.ready(function() {
@@ -3619,10 +3623,6 @@
         quoteIndicators.init();
       }
       if (conf['Fix XXX\'d Post Numbers']) unxify.init();
-      if (conf['Quick Reply'] && conf['Hide Original Post Form']) {
-        Main.css += 'form[name=post] { display: none; }';
-      }
-      Main.addStyle();
       return $.ready(Main.ready);
     },
     ready: function() {

changelog

@@ -6,7 +6,7 @@ master
     - Hightlight, or hide.
   New filter group: Image dimensions.
   Fix posting on Safari.
-  Fix rare case where the QR would not accept images.
+  Fix rare case where the QR would not accept certain image types.
 
 2.26.4
 - Mayhem

script.coffee

@@ -2848,6 +2848,11 @@ Main =
 
     $.ready options.init
 
+    if conf['Quick Reply'] and conf['Hide Original Post Form']
+      Main.css += 'form[name=post] { display: none; }'
+
+    Main.addStyle()
+
     now = Date.now()
     if conf['Check for Updates'] and $.get('lastUpdate',  0) < now - 6*HOUR
       $.ready -> $.add d.head, $.el 'script', src: 'https://raw.github.com/mayhemydg/4chan-x/master/latest.js'
@@ -2918,11 +2923,6 @@ Main =
     if conf['Fix XXX\'d Post Numbers']
       unxify.init()
 
-    if conf['Quick Reply'] and conf['Hide Original Post Form']
-      Main.css += 'form[name=post] { display: none; }'
-
-    Main.addStyle()
-
     $.ready Main.ready
 
   ready: ->