diff --git a/lms/djangoapps/django_comment_client/forum/views.py b/lms/djangoapps/django_comment_client/forum/views.py
index 784d7e8eef..2297cd9fa7 100644
--- a/lms/djangoapps/django_comment_client/forum/views.py
+++ b/lms/djangoapps/django_comment_client/forum/views.py
@@ -22,7 +22,7 @@ import django_comment_client.utils as utils
 import comment_client as cc
 import xml.sax.saxutils as saxutils
 
-THREADS_PER_PAGE = 2
+THREADS_PER_PAGE = 20
 INLINE_THREADS_PER_PAGE = 5
 PAGES_NEARBY_DELTA = 2
 escapedict = {'"': '"'}
@@ -78,7 +78,7 @@ def get_threads(request, course_id, discussion_id=None, per_page=THREADS_PER_PAG
         user.save()
 
     query_params = merge_dict(default_query_params,
-                              strip_none(extract(request.GET, ['page', 'sort_key', 'sort_order', 'text', 'tags'])))
+                              strip_none(extract(request.GET, ['page', 'sort_key', 'sort_order', 'text', 'tags', 'commentable_ids'])))
 
     threads, page, num_pages = cc.Thread.search(query_params)
 
@@ -150,6 +150,8 @@ def forum_form_discussion(request, course_id):
         return utils.JsonResponse({
             'discussion_data': threads, # TODO: Standardize on 'discussion_data' vs 'threads'
             'annotated_content_info': annotated_content_info,
+            'num_pages': query_params['num_pages'],
+            'page': query_params['page'],
         })
     else:
         #recent_active_threads = cc.search_recent_active_threads(
@@ -253,6 +255,7 @@ def single_thread(request, course_id, discussion_id, thread_id):
             'threads': saxutils.escape(json.dumps(threads), escapedict),
             'category_map': category_map,
             'roles': saxutils.escape(json.dumps(utils.get_role_ids(course_id)), escapedict),
+            'thread_pages': query_params['num_pages'],
         }
 
         return render_to_response('discussion/single_thread.html', context)
diff --git a/lms/djangoapps/django_comment_client/permissions.py b/lms/djangoapps/django_comment_client/permissions.py
index bc51b14eb5..b95a890dda 100644
--- a/lms/djangoapps/django_comment_client/permissions.py
+++ b/lms/djangoapps/django_comment_client/permissions.py
@@ -11,7 +11,7 @@ cache = cache.get_cache('default')
 def cached_has_permission(user, permission, course_id=None):
     """
     Call has_permission if it's not cached. A change in a user's role or
-    a role's permissions will only become effective after CACHE_LIFESPAN seconds. 
+    a role's permissions will only become effective after CACHE_LIFESPAN seconds.
     """
     CACHE_LIFESPAN = 60
     key = "permission_%d_%s_%s" % (user.id, str(course_id), permission)
@@ -54,8 +54,8 @@ def check_conditions_permissions(user, permissions, course_id, **kwargs):
     """
     Accepts a list of permissions and proceed if any of the permission is valid.
     Note that ["can_view", "can_edit"] will proceed if the user has either
-    "can_view" or "can_edit" permission. To use AND operator in between, wrap them in 
-    a list. 
+    "can_view" or "can_edit" permission. To use AND operator in between, wrap them in
+    a list.
     """
 
     def test(user, per, operator="or"):
@@ -87,7 +87,7 @@ VIEW_PERMISSIONS = {
     'vote_for_thread'   :       [['vote', 'is_open']],
     'undo_vote_for_thread':     [['unvote', 'is_open']],
     'follow_thread'     :       ['follow_thread'],
-    'follow_commentable':       ['follow_commentable'], 
+    'follow_commentable':       ['follow_commentable'],
     'follow_user'       :       ['follow_user'],
     'unfollow_thread'   :       ['unfollow_thread'],
     'unfollow_commentable':     ['unfollow_commentable'],
diff --git a/lms/lib/comment_client/thread.py b/lms/lib/comment_client/thread.py
index 4a96ed20ac..bda032bbdf 100644
--- a/lms/lib/comment_client/thread.py
+++ b/lms/lib/comment_client/thread.py
@@ -30,7 +30,7 @@ class Thread(models.Model):
                           'course_id': query_params['course_id'],
                           'recursive': False}
         params = merge_dict(default_params, strip_blank(strip_none(query_params)))
-        if query_params.get('text') or query_params.get('tags'):
+        if query_params.get('text') or query_params.get('tags') or query_params.get('commentable_ids'):
             url = cls.url(action='search')
         else:
             url = cls.url(action='get_all', params=extract(params, 'commentable_id'))
@@ -38,7 +38,7 @@ class Thread(models.Model):
                 del params['commentable_id']
         response = perform_request('get', url, params, *args, **kwargs)
         return response.get('collection', []), response.get('page', 1), response.get('num_pages', 1)
-        
+
     @classmethod
     def url_for_threads(cls, params={}):
         if params.get('commentable_id'):
diff --git a/lms/static/coffee/src/discussion/discussion.coffee b/lms/static/coffee/src/discussion/discussion.coffee
index 91083c94e3..698fa1b039 100644
--- a/lms/static/coffee/src/discussion/discussion.coffee
+++ b/lms/static/coffee/src/discussion/discussion.coffee
@@ -18,18 +18,23 @@ if Backbone?
       @current_page < @pages
 
     addThread: (thread, options) ->
+      # TODO: Check for existing thread with same ID?
       options ||= {}
       model = new Thread thread
       @add model
       model
 
-    retrieveAnotherPage: (search_text="", commentable_id="", sort_key="")->
-      # TODO: Obey dropdown filter (commentable_id)
+    retrieveAnotherPage: (search_text="", commentable_ids="", sort_key="")->
+      # TODO: I really feel that this belongs in DiscussionThreadListView
       @current_page += 1
       url = DiscussionUtil.urlFor 'threads'
-      data = { page: @current_page, text: search_text }
+      data = { page: @current_page }
+      if search_text
+        data['text'] = search_text
       if sort_key
         data['sort_key'] = sort_key
+      if commentable_ids
+        data['commentable_ids'] = commentable_ids
       DiscussionUtil.safeAjax
         $elem: @$el
         url: url
diff --git a/lms/static/coffee/src/discussion/views/discussion_thread_list_view.coffee b/lms/static/coffee/src/discussion/views/discussion_thread_list_view.coffee
index 90bd7c4978..6f1ee52c08 100644
--- a/lms/static/coffee/src/discussion/views/discussion_thread_list_view.coffee
+++ b/lms/static/coffee/src/discussion/views/discussion_thread_list_view.coffee
@@ -14,9 +14,11 @@ if Backbone?
       @displayedCollection = new Discussion(@collection.models, pages: @collection.pages)
       @collection.on "change", @reloadDisplayedCollection
       @sortBy = "date"
+      @discussionIds=""
       @collection.on "reset", (discussion) =>
         board = $(".current-board").html()
         @displayedCollection.current_page = discussion.current_page
+        @displayedCollection.pages = discussion.pages
         @displayedCollection.reset discussion.models
         # TODO: filter correctly
         # target = _.filter($("a.topic:contains('#{board}')"), (el) -> el.innerText == "General" || el.innerHTML == "General")
@@ -110,17 +112,18 @@ if Backbone?
 
       @$(".post-list").html(rendered.html())
       @renderMorePages()
+      @updateSidebar()
       @trigger "threads:rendered"
 
     renderMorePages: ->
       if @displayedCollection.hasMorePages()
         @$(".post-list").append("<li class='more-pages'><a href='#'>Load more</a></li>")
 
-    loadMorePages: ->
-      # TODO: Obey dropdown filter
+    loadMorePages: (event) ->
+      event.preventDefault()
       @$(".more-pages").html('<div class="loading-animation"></div>')
       @$(".more-pages").addClass("loading")
-      @collection.retrieveAnotherPage(@current_search, "", @sortBy)
+      @collection.retrieveAnotherPage(@current_search, @discussionIds, @sortBy)
 
     renderThread: (thread) =>
       content = $(_.template($("#thread-list-item-template").html())(thread.toJSON()))
@@ -232,14 +235,27 @@ if Backbone?
         @setTopic(event)
         @clearSearch @filterTopic, event
       else
-        @setTopic(event)
+        @setTopic(event)  # just sets the title for the dropdown
         item = $(event.target).closest('li')
         if item.find("span.board-name").data("discussion_id") == "#all"
           item = item.parent()
+          @discussionIds = ""
         discussionIds = _.map item.find(".board-name[data-discussion_id]"), (board) -> $(board).data("discussion_id").id
-        filtered = @collection.filter (thread) =>
-          _.include(discussionIds, thread.get('commentable_id'))
-        @displayedCollection.reset filtered
+        @retrieveDiscussions(discussionIds)
+
+    retrieveDiscussions: (discussion_ids) ->
+      @discussionIds = discussion_ids.join(',')
+      url = DiscussionUtil.urlFor("search")
+      DiscussionUtil.safeAjax
+        data: { 'commentable_ids': @discussionIds }
+        url: url
+        type: "GET"
+        success: (response, textStatus) =>
+          @collection.current_page = response.page
+          @collection.pages = response.num_pages
+          @collection.reset(response.discussion_data)
+          Content.loadContentInfos(response.content_info)
+          @displayedCollection.reset(@collection.models)
 
     sortThreads: (event) ->
       @$(".sort-bar a").removeClass("active")
@@ -283,6 +299,8 @@ if Backbone?
             # TODO: Augment existing collection?
             @collection.reset(response.discussion_data)
             Content.loadContentInfos(response.content_info)
+            @collection.current_page = response.page
+            @collection.pages = response.num_pages
             # TODO: Perhaps reload user info so that votes can be updated.
             # In the future we might not load all of a user's votes at once
             # so this would probably be necessary anyway
diff --git a/lms/static/js/jquery.tagsinput.js b/lms/static/js/jquery.tagsinput.js
index 563567ac46..917eba817c 100644
--- a/lms/static/js/jquery.tagsinput.js
+++ b/lms/static/js/jquery.tagsinput.js
@@ -105,7 +105,7 @@
                         $('<span>').text(value).append('&nbsp;&nbsp;'),
                         $('<a>', {
                             href  : '#',
-                            title : 'Removing tag',
+                            title : 'Remove tag',
                             text  : 'x'
                         }).click(function () {
                             return $('#' + id).removeTag(escape(value));
diff --git a/lms/templates/discussion/single_thread.html b/lms/templates/discussion/single_thread.html
index 0cc1f28b24..9ec05b1534 100644
--- a/lms/templates/discussion/single_thread.html
+++ b/lms/templates/discussion/single_thread.html
@@ -24,7 +24,7 @@
 
 <%include file="_new_post.html" />
 
-<section class="discussion container" id="discussion-container" data-roles="${roles}" data-course-id="${course_id}" data-user-info="${user_info}" data-threads="${threads}" data-content-info="${annotated_content_info}">
+<section class="discussion container" id="discussion-container" data-roles="${roles}" data-course-id="${course_id}" data-user-info="${user_info}" data-threads="${threads}" data-content-info="${annotated_content_info}" data-thread-pages="${thread_pages}">
   <div class="discussion-body">
     <div class="sidebar"></div>
     <div class="discussion-column"></div>