diff --git a/src/General/Get.coffee b/src/General/Get.coffee
index 00d295606..07c52214d 100755
--- a/src/General/Get.coffee
+++ b/src/General/Get.coffee
@@ -131,6 +131,7 @@ Get =
         $.cache url,
           -> Get.archivedPost @, boardID, postID, root, context
         ,
+          responseType: 'json'
           withCredentials: url.archive.withCredentials
       else
         $.addClass root, 'warning'
diff --git a/src/Miscellaneous/Fourchan.coffee b/src/Miscellaneous/Fourchan.coffee
index 290c16265..7d36e8b93 100755
--- a/src/Miscellaneous/Fourchan.coffee
+++ b/src/Miscellaneous/Fourchan.coffee
@@ -18,10 +18,11 @@ Fourchan =
       # https://github.com/MayhemYDG/4chan-x/issues/645#issuecomment-13704562
       $.globalEval '''
         window.addEventListener('jsmath', function(e) {
+          if (!jsMath) return;
           if (jsMath.loaded) {
             // process one post
             jsMath.ProcessBeforeShowing(e.detail);
-          } else {
+          } else if (jsMath.Autoload && jsMath.Autoload.checked) {
             // load jsMath and process whole document
             jsMath.Autoload.Script.Push('ProcessBeforeShowing', [null]);
             jsMath.Autoload.LoadJsMath();
@@ -40,7 +41,7 @@ Fourchan =
     $.off window, 'prettyprint:cb', apply
     return
   math: ->
-    return if @isClone or !$ '.math', @nodes.comment
+    return if (@isClone and doc.contains @origin.nodes.root) or !$ '.math', @nodes.comment
     $.event 'jsmath', @nodes.post, window
   parseThread: (threadID, offset, limit) ->
     # Fix /sci/