diff --git a/common/static/coffee/src/discussion/views/discussion_thread_profile_view.coffee b/common/static/coffee/src/discussion/views/discussion_thread_profile_view.coffee
index d31a402a99..8b47696c01 100644
--- a/common/static/coffee/src/discussion/views/discussion_thread_profile_view.coffee
+++ b/common/static/coffee/src/discussion/views/discussion_thread_profile_view.coffee
@@ -50,7 +50,7 @@ if Backbone?
 
     convertMath: ->
       element = @$(".post-body")
-      element.html DiscussionUtil.postMathJaxProcessor DiscussionUtil.markdownWithHighlight element.html()
+      element.html DiscussionUtil.postMathJaxProcessor DiscussionUtil.markdownWithHighlight element.text()
       MathJax.Hub.Queue ["Typeset", MathJax.Hub, element[0]]
 
     renderResponses: ->
diff --git a/common/static/coffee/src/discussion/views/discussion_thread_show_view.coffee b/common/static/coffee/src/discussion/views/discussion_thread_show_view.coffee
index a8e95c2565..6320c3d1e3 100644
--- a/common/static/coffee/src/discussion/views/discussion_thread_show_view.coffee
+++ b/common/static/coffee/src/discussion/views/discussion_thread_show_view.coffee
@@ -47,7 +47,7 @@ if Backbone?
 
     convertMath: ->
       element = @$(".post-body")
-      element.html DiscussionUtil.postMathJaxProcessor DiscussionUtil.markdownWithHighlight element.html()
+      element.html DiscussionUtil.postMathJaxProcessor DiscussionUtil.markdownWithHighlight element.text()
       MathJax.Hub.Queue ["Typeset", MathJax.Hub, element[0]]
 
     toggleVote: (event) ->
diff --git a/common/static/coffee/src/discussion/views/response_comment_show_view.coffee b/common/static/coffee/src/discussion/views/response_comment_show_view.coffee
index e6c8064978..84e7357e1f 100644
--- a/common/static/coffee/src/discussion/views/response_comment_show_view.coffee
+++ b/common/static/coffee/src/discussion/views/response_comment_show_view.coffee
@@ -26,7 +26,7 @@ if Backbone?
 
     convertMath: ->
       body = @$el.find(".response-body")
-      body.html DiscussionUtil.postMathJaxProcessor DiscussionUtil.markdownWithHighlight body.html()
+      body.html DiscussionUtil.postMathJaxProcessor DiscussionUtil.markdownWithHighlight body.text()
       MathJax.Hub.Queue ["Typeset", MathJax.Hub, body[0]]
 
     markAsStaff: ->
diff --git a/common/static/coffee/src/discussion/views/thread_response_show_view.coffee b/common/static/coffee/src/discussion/views/thread_response_show_view.coffee
index 32683fe6f6..1f305ddf34 100644
--- a/common/static/coffee/src/discussion/views/thread_response_show_view.coffee
+++ b/common/static/coffee/src/discussion/views/thread_response_show_view.coffee
@@ -30,7 +30,7 @@ if Backbone?
 
     convertMath: ->
       element = @$(".response-body")
-      element.html DiscussionUtil.postMathJaxProcessor DiscussionUtil.markdownWithHighlight element.html()
+      element.html DiscussionUtil.postMathJaxProcessor DiscussionUtil.markdownWithHighlight element.text()
       MathJax.Hub.Queue ["Typeset", MathJax.Hub, element[0]]
 
     markAsStaff: ->
diff --git a/lms/static/sass/course/courseware/_sidebar.scss b/lms/static/sass/course/courseware/_sidebar.scss
index 4e893d2455..81b497d4f9 100644
--- a/lms/static/sass/course/courseware/_sidebar.scss
+++ b/lms/static/sass/course/courseware/_sidebar.scss
@@ -67,7 +67,7 @@ section.course-index {
     }
 
     .chapter {
-      width: 100%;
+      width: 100% !important;
       @include box-sizing(border-box);
       padding: 11px 14px;
       @include linear-gradient(top, rgba(255, 255, 255, .6), rgba(255, 255, 255, 0));
@@ -99,6 +99,8 @@ section.course-index {
       @include border-radius(0);
       margin: 0;
       padding: 9px 0 9px 9px;
+      overflow: auto;
+      width: 100%;
 
       li {
         border-bottom: 0;