diff --git a/rhodecode/controllers/changeset.py b/rhodecode/controllers/changeset.py
--- a/rhodecode/controllers/changeset.py
+++ b/rhodecode/controllers/changeset.py
@@ -342,11 +342,14 @@ class ChangesetController(BaseRepoContro
                             % {'transition_icon': '>',
                                'status': ChangesetStatus.get_status_lbl(status)})
 
-        multi_commit_ids = filter(
-            lambda s: s not in ['', None],
-            request.POST.get('commit_ids', '').split(','),)
+        multi_commit_ids = []
+        for _commit_id in request.POST.get('commit_ids', '').split(','):
+            if _commit_id not in ['', None, EmptyCommit.raw_id]:
+                if _commit_id not in multi_commit_ids:
+                    multi_commit_ids.append(_commit_id)
 
         commit_ids = multi_commit_ids or [commit_id]
+
         comment = None
         for current_id in filter(None, commit_ids):
             c.co = comment = CommentsModel().create(
diff --git a/rhodecode/public/js/src/rhodecode/comments.js b/rhodecode/public/js/src/rhodecode/comments.js
--- a/rhodecode/public/js/src/rhodecode/comments.js
+++ b/rhodecode/public/js/src/rhodecode/comments.js
@@ -43,12 +43,16 @@ var bindToggleButtons = function() {
 };
 
 /* Comment form for main and inline comments */
+(function(mod) {
 
-(function(mod) {
-  if (typeof exports == "object" && typeof module == "object") // CommonJS
-    module.exports = mod();
-  else // Plain browser env
-    (this || window).CommentForm = mod();
+    if (typeof exports == "object" && typeof module == "object") {
+        // CommonJS
+        module.exports = mod();
+    }
+    else {
+        // Plain browser env
+        (this || window).CommentForm = mod();
+    }
 
 })(function() {
     "use strict";
@@ -236,6 +240,8 @@ var bindToggleButtons = function() {
             $(this.statusChange).select2('readonly', false);
         };
 
+        this.globalSubmitSuccessCallback = function(){};
+
         this.submitAjaxPOST = function(url, postData, successHandler, failHandler) {
             failHandler = failHandler || function() {};
             var postData = toQueryString(postData);
@@ -262,6 +268,11 @@ var bindToggleButtons = function() {
             this.handleFormSubmit = callback;
         };
 
+        // overwrite a submitSuccessHandler
+        this.setGlobalSubmitSuccessCallback = function(callback) {
+            this.globalSubmitSuccessCallback = callback;
+        };
+
         // default handler for for submit for main comments
         this.handleFormSubmit = function() {
             var text = self.cm.getValue();
@@ -287,6 +298,7 @@ var bindToggleButtons = function() {
             if (resolvesCommentId){
                 postData['resolves_comment_id'] = resolvesCommentId;
             }
+
             var submitSuccessCallback = function(o) {
                 if (status) {
                     location.reload(true);
@@ -300,6 +312,10 @@ var bindToggleButtons = function() {
                         self.markCommentResolved(resolvesCommentId);
                     }
                 }
+
+                // run global callback on submit
+                self.globalSubmitSuccessCallback();
+
             };
             var submitFailCallback = function(){
                 self.resetCommentFormState(text);
@@ -585,22 +601,25 @@ var CommentsController = function() {
       return commentForm;
   };
 
-  this.createGeneralComment = function(lineNo, placeholderText, resolvesCommentId){
+  this.createGeneralComment = function (lineNo, placeholderText, resolvesCommentId) {
 
       var tmpl = $('#cb-comment-general-form-template').html();
       tmpl = tmpl.format(null, 'general');
       var $form = $(tmpl);
 
-      var curForm = $('#cb-comment-general-form-placeholder').find('form');
+      var $formPlaceholder = $('#cb-comment-general-form-placeholder');
+      var curForm = $formPlaceholder.find('form');
       if (curForm){
           curForm.remove();
       }
-      $('#cb-comment-general-form-placeholder').append($form);
+      $formPlaceholder.append($form);
 
       var _form = $($form[0]);
       var commentForm = this.createCommentForm(
           _form, lineNo, placeholderText, true, resolvesCommentId);
       commentForm.initStatusChangeSelector();
+
+      return commentForm;
   };
 
   this.createComment = function(node, resolutionComment) {
@@ -690,6 +709,9 @@ var CommentsController = function() {
                     commentForm.markCommentResolved(resolvesCommentId);
                 }
 
+                // run global callback on submit
+                commentForm.globalSubmitSuccessCallback();
+
               } catch (e) {
                 console.error(e);
               }
diff --git a/rhodecode/templates/changeset/changeset_file_comment.mako b/rhodecode/templates/changeset/changeset_file_comment.mako
--- a/rhodecode/templates/changeset/changeset_file_comment.mako
+++ b/rhodecode/templates/changeset/changeset_file_comment.mako
@@ -190,7 +190,7 @@
       if is_pull_request:
         placeholder = _('Leave a comment on this Pull Request.')
       elif is_compare:
-        placeholder = _('Leave a comment on all commits in this range.')
+        placeholder = _('Leave a comment on {} commits in this range.').format(len(form_extras))
       else:
         placeholder = _('Leave a comment on this Commit.')
     %>
@@ -207,7 +207,59 @@
     <script type="text/javascript">
         var lineNo = 'general';
         var resolvesCommentId = null;
-        Rhodecode.comments.createGeneralComment(lineNo, "${placeholder}", resolvesCommentId)
+        var generalCommentForm = Rhodecode.comments.createGeneralComment(
+            lineNo, "${placeholder}", resolvesCommentId);
+
+        // set custom success callback on rangeCommit
+        % if is_compare:
+            generalCommentForm.setHandleFormSubmit(function(o) {
+                var self = generalCommentForm;
+
+                var text = self.cm.getValue();
+                var status = self.getCommentStatus();
+                var commentType = self.getCommentType();
+
+                if (text === "" && !status) {
+                    return;
+                }
+
+                // we can pick which commits we want to make the comment by
+                // selecting them via click on preview pane, this will alter the hidden inputs
+                var cherryPicked = $('#changeset_compare_view_content .compare_select.hl').length > 0;
+
+                var commitIds = [];
+                $('#changeset_compare_view_content .compare_select').each(function(el) {
+                    var commitId = this.id.replace('row-', '');
+                    if ($(this).hasClass('hl') || !cherryPicked) {
+                        $("input[data-commit-id='{0}']".format(commitId)).val(commitId);
+                        commitIds.push(commitId);
+                    } else {
+                        $("input[data-commit-id='{0}']".format(commitId)).val('')
+                    }
+                });
+
+                self.setActionButtonsDisabled(true);
+                self.cm.setOption("readOnly", true);
+                var postData = {
+                    'text': text,
+                    'changeset_status': status,
+                    'comment_type': commentType,
+                    'commit_ids': commitIds,
+                    'csrf_token': CSRF_TOKEN
+                };
+
+                var submitSuccessCallback = function(o) {
+                    location.reload(true);
+                };
+                var submitFailCallback = function(){
+                    self.resetCommentFormState(text)
+                };
+                self.submitAjaxPOST(
+                    self.submitUrl, postData, submitSuccessCallback, submitFailCallback);
+            });
+        % endif
+
+
     </script>
     % else:
     ## form state when not logged in
diff --git a/rhodecode/templates/compare/compare_diff.mako b/rhodecode/templates/compare/compare_diff.mako
--- a/rhodecode/templates/compare/compare_diff.mako
+++ b/rhodecode/templates/compare/compare_diff.mako
@@ -171,50 +171,6 @@
                     %>
                     <div>
                         ${comment.comments(h.url('changeset_comment', repo_name=c.repo_name, revision='0'*16), None, is_compare=True, form_extras=revs(c.commit_ranges))}
-                        <script type="text/javascript">
-
-                            mainCommentForm.setHandleFormSubmit(function(o) {
-                                var text = mainCommentForm.cm.getValue();
-                                var status = mainCommentForm.getCommentStatus();
-
-                                if (text === "" && !status) {
-                                    return;
-                                }
-
-                                // we can pick which commits we want to make the comment by
-                                // selecting them via click on preview pane, this will alter the hidden inputs
-                                var cherryPicked = $('#changeset_compare_view_content .compare_select.hl').length > 0;
-
-                                var commitIds = [];
-                                $('#changeset_compare_view_content .compare_select').each(function(el) {
-                                    var commitId = this.id.replace('row-', '');
-                                    if ($(this).hasClass('hl') || !cherryPicked) {
-                                        $("input[data-commit-id='{0}']".format(commitId)).val(commitId)
-                                        commitIds.push(commitId);
-                                    } else {
-                                        $("input[data-commit-id='{0}']".format(commitId)).val('')
-                                    }
-                                });
-
-                                mainCommentForm.setActionButtonsDisabled(true);
-                                mainCommentForm.cm.setOption("readOnly", true);
-                                var postData = {
-                                    'text': text,
-                                    'changeset_status': status,
-                                    'commit_ids': commitIds,
-                                    'csrf_token': CSRF_TOKEN
-                                };
-
-                                var submitSuccessCallback = function(o) {
-                                    location.reload(true);
-                                };
-                                var submitFailCallback = function(){
-                                    mainCommentForm.resetCommentFormState(text)
-                                };
-                                mainCommentForm.submitAjaxPOST(
-                                    mainCommentForm.submitUrl, postData, submitSuccessCallback, submitFailCallback);
-                            });
-                        </script>
                     </div>
                 </div>
               </div>