diff --git a/services/web/app/views/project/editor/editor.pug b/services/web/app/views/project/editor/editor.pug
index ce24108f77..6c062f3cbe 100644
--- a/services/web/app/views/project/editor/editor.pug
+++ b/services/web/app/views/project/editor/editor.pug
@@ -20,7 +20,6 @@ div.full-size(
 			'rp-size-expanded': ui.reviewPanelOpen,\
 			'rp-layout-left': reviewPanel.layoutToLeft,\
 			'rp-loading-threads': reviewPanel.loadingThreads,\
-			'rp-new-comment-ui': reviewPanel.newAddCommentUI\
 		}"
 	)
 		.loading-panel(ng-show="!editor.sharejs_doc || editor.opening")
diff --git a/services/web/app/views/project/editor/review-panel.pug b/services/web/app/views/project/editor/review-panel.pug
index da14b69a99..2035af4775 100644
--- a/services/web/app/views/project/editor/review-panel.pug
+++ b/services/web/app/views/project/editor/review-panel.pug
@@ -8,7 +8,7 @@
 		) !{translate("track_changes_is_on")}
 		a.rp-add-comment-btn(
 			href
-			ng-if="reviewPanel.newAddCommentUI && reviewPanel.entries[editor.open_doc_id]['add-comment'] != null"
+			ng-if="reviewPanel.entries[editor.open_doc_id]['add-comment'] != null"
 			ng-click="addNewComment();"
 		) 
 			i.fa.fa-comment
@@ -81,8 +81,6 @@
 						on-start-new="startNewComment();"
 						on-submit="submitNewComment(content);"
 						on-cancel="cancelNewComment();"
-						on-indicator-click="toggleReviewPanel();"
-						layout-to-left="reviewPanel.layoutToLeft"
 					)
 
 	.rp-entry-list(
@@ -322,14 +320,6 @@ script(type='text/ng-template', id='resolvedCommentEntryTemplate')
 script(type='text/ng-template', id='addCommentEntryTemplate')
 	div
 		.rp-entry-callout.rp-entry-callout-add-comment
-		.rp-entry-indicator.rp-entry-indicator-add-comment(
-			ng-if="!commentState.adding"
-			ng-click="startNewComment(); onIndicatorClick();"
-			tooltip=translate("add_comment")
-			tooltip-placement="{{ layoutToLeft ? 'left' : 'right' }}"
-			tooltip-append-to-body="true"
-		)
-			i.fa.fa-commenting
 		.rp-entry.rp-entry-add-comment(
 			ng-class="[ (state.isAdding ? 'rp-entry-adding-comment' : ''), (entry.focused ? 'rp-entry-focused' : '')]"
 		)
diff --git a/services/web/app/views/project/list.pug b/services/web/app/views/project/list.pug
index aad484a75e..ddf80a0b5f 100644
--- a/services/web/app/views/project/list.pug
+++ b/services/web/app/views/project/list.pug
@@ -3,15 +3,11 @@ extends ../layout
 block content
 	//- We need to do .replace(/\//g, '\\/') do that '</script>' -> '<\/script>'
 	//- and doesn't prematurely end the script tag.
-
-
+	script#data(type="application/json").
+		!{JSON.stringify({ projects: projects, tags: tags, notifications: notifications }).replace(/\//g, '\\/')}
 
 	script(type="text/javascript").
-		window.data = {
-			projects: !{JSON.stringify(projects).replace(/\//g, '\\/')},
-			tags: !{JSON.stringify(tags).replace(/\//g, '\\/')},
-			notifications: !{JSON.stringify(notifications).replace(/\//g, '\\/')}
-		};
+		window.data = JSON.parse($("#data").text());
 		window.algolia = {
 			institutions: {
 				app_id:  '#{algolia_app_id}',
diff --git a/services/web/public/coffee/ide/review-panel/controllers/ReviewPanelController.coffee b/services/web/public/coffee/ide/review-panel/controllers/ReviewPanelController.coffee
index fff1d31671..bf3f96ffc3 100644
--- a/services/web/public/coffee/ide/review-panel/controllers/ReviewPanelController.coffee
+++ b/services/web/public/coffee/ide/review-panel/controllers/ReviewPanelController.coffee
@@ -4,7 +4,7 @@ define [
 	"ide/colors/ColorManager"
 	"ide/review-panel/RangesTracker"
 ], (App, EventEmitter, ColorManager, RangesTracker) ->
-	App.controller "ReviewPanelController", ($scope, $element, ide, $timeout, $http, $modal, event_tracking, sixpack, localStorage) ->
+	App.controller "ReviewPanelController", ($scope, $element, ide, $timeout, $http, $modal, event_tracking, localStorage) ->
 		$reviewPanelEl = $element.find "#review-panel"
 
 		$scope.SubViews =
@@ -24,17 +24,8 @@ define [
 				loading: false
 			commentThreads: {}
 			resolvedThreadIds: {}
-			layoutToLeft: false
 			rendererData: {}
 			loadingThreads: false
-			newAddCommentUI: false # Test new UI for adding comments; remove afterwards.
-
-		$scope.shouldABAddCommentBtn = false
-		if $scope.user.signUpDate >= '2017-03-27'
-			sixpack.participate "add-comment-btn", [ "default", "editor-corner" ], (variation) ->
-				$scope.shouldABAddCommentBtn = true
-				$scope.variationABAddCommentBtn = variation
-				$scope.reviewPanel.newAddCommentUI = (variation == "editor-corner")
 
 		window.addEventListener "beforeunload", () ->
 			collapsedStates = {}
@@ -45,11 +36,9 @@ define [
 			localStorage("docs_collapsed_state:#{$scope.project_id}", valToStore)
 
 		$scope.$on "layout:pdf:linked", (event, state) ->
-			$scope.reviewPanel.layoutToLeft = (state.east?.size < 220 || state.east?.initClosed)
 			$scope.$broadcast "review-panel:layout"
 
 		$scope.$on "layout:pdf:resize", (event, state) ->
-			$scope.reviewPanel.layoutToLeft = (state.east?.size < 220 || state.east?.initClosed)
 			$scope.$broadcast "review-panel:layout", false
 
 		$scope.$on "expandable-text-area:resize", (event) ->
@@ -58,9 +47,6 @@ define [
 
 		$scope.$on "review-panel:sizes", (e, sizes) ->
 			$scope.$broadcast "editor:set-scroll-size", sizes
-
-		$scope.$watch "ui.pdfLayout", (layout) ->
-			$scope.reviewPanel.layoutToLeft = (layout == "flat")
 		
 		$scope.$watch "project.features.trackChangesVisible", (visible) ->
 			return if !visible?
@@ -173,7 +159,7 @@ define [
 			entries = $scope.reviewPanel.entries[$scope.editor.open_doc_id] or {}
 			permEntries = {}
 			for entry, entryData of entries
-				if entry != "add-comment" or !$scope.reviewPanel.newAddCommentUI
+				if entry != "add-comment"
 					permEntries[entry] = entryData 
 			Object.keys(permEntries).length
 		), (nEntries) ->
@@ -336,8 +322,6 @@ define [
 			$scope.$broadcast "comment:select_line"
 			$timeout () ->
 				$scope.$broadcast "review-panel:layout"
-			if $scope.shouldABAddCommentBtn and !$scope.ui.reviewPanelOpen
-				sixpack.convert "add-comment-btn"
 
 		$scope.submitNewComment = (content) ->
 			return if !content? or content == ""
diff --git a/services/web/public/coffee/ide/review-panel/directives/addCommentEntry.coffee b/services/web/public/coffee/ide/review-panel/directives/addCommentEntry.coffee
index 9d33bcb35a..a6cf315bfa 100644
--- a/services/web/public/coffee/ide/review-panel/directives/addCommentEntry.coffee
+++ b/services/web/public/coffee/ide/review-panel/directives/addCommentEntry.coffee
@@ -8,8 +8,6 @@ define [
 			onStartNew: "&"
 			onSubmit: "&"
 			onCancel: "&"
-			onIndicatorClick: "&"	
-			layoutToLeft: "="
 		link: (scope, element, attrs) ->
 			scope.state =
 				isAdding: false
diff --git a/services/web/public/coffee/ide/review-panel/directives/reviewPanelSorted.coffee b/services/web/public/coffee/ide/review-panel/directives/reviewPanelSorted.coffee
index b76f891e7f..236668c5ab 100644
--- a/services/web/public/coffee/ide/review-panel/directives/reviewPanelSorted.coffee
+++ b/services/web/public/coffee/ide/review-panel/directives/reviewPanelSorted.coffee
@@ -127,15 +127,13 @@ define [
 				ace.require("ace/lib/event").addMouseWheelListener scroller[0], (e) ->
 					deltaY = e.wheelY
 					old_top = parseInt(list.css("top"))
-					top = Math.min(0, old_top - deltaY * 4)
-					list.css(top: top)
+					top = old_top - deltaY * 4
 					scrollAce(-top)
 					e.preventDefault()
 
-				# Use these to avoid unnecessary updates. Scrolling one
-				# panel causes us to scroll the other panel, but there's no
-				# need to trigger the event back to the original panel.
-				ignoreNextPanelEvent = false
+				# We always scroll by telling Ace to scroll and then updating the 
+				# review panel. This lets Ace manage the size of the scroller and
+				# when it overflows.
 				ignoreNextAceEvent = false
 
 				scrollPanel = (scrollTop, height) ->
@@ -148,11 +146,7 @@ define [
 						list.css(top: - scrollTop)
 			
 				scrollAce = (scrollTop) ->
-					if ignoreNextPanelEvent
-						ignoreNextPanelEvent = false
-					else
-						ignoreNextAceEvent = true
-						scope.reviewPanelEventsBridge.emit "externalScroll", scrollTop
+					scope.reviewPanelEventsBridge.emit "externalScroll", scrollTop
 				
 				scope.reviewPanelEventsBridge.on "aceScroll", scrollPanel
 				scope.$on "$destroy", () ->
diff --git a/services/web/public/js/ace-1.2.5/ace.js b/services/web/public/js/ace-1.2.5/ace.js
index 89bef3543d..0c6b9cbbfb 100644
--- a/services/web/public/js/ace-1.2.5/ace.js
+++ b/services/web/public/js/ace-1.2.5/ace.js
@@ -2283,9 +2283,13 @@ var TextInput = function(parentNode, host) {
         if (e.type == "compositionend" && c.range) {
             host.selection.setRange(c.range);
         }
-        // WORKAROUND: Accent keys and Korean keys don't work in Chrome >53.
-        // https://github.com/ajaxorg/ace/issues/3045
-        if (useragent.isChrome >= 53) onInput();
+        var needsOnInput =
+            (!!useragent.isChrome && useragent.isChrome >= 53) ||
+            (!!useragent.isWebKit && useragent.isWebKit >= 603);
+
+        if (needsOnInput) {
+          onInput();
+        }
     };
     
     
diff --git a/services/web/public/stylesheets/app/editor/review-panel.less b/services/web/public/stylesheets/app/editor/review-panel.less
index c069c536e2..59f0e40566 100644
--- a/services/web/public/stylesheets/app/editor/review-panel.less
+++ b/services/web/public/stylesheets/app/editor/review-panel.less
@@ -96,10 +96,12 @@
 		flex-direction: column;
 		width: @review-panel-width;
 		overflow: visible;
+		border-left-width: 1px;
 	}
 	.rp-size-mini & {
 		width: @review-off-width;
 		z-index: 6;
+		border-left-width: 1px;
 	}
 	
 	position: absolute;
@@ -107,7 +109,7 @@
 	bottom: 0px;
 	right: 0px;
 	background-color: @rp-bg-blue;
-	border-left: solid 1px @rp-border-grey;
+	border-left: solid 0px @rp-border-grey;
 	font-size: @rp-base-font-size;
 	color: @rp-type-blue;
 	z-index: 6;
@@ -181,6 +183,9 @@
 	.rp-size-mini & {
 		display: block;
 	}
+	.rp-size-mini &-add-comment {
+		display: none;
+	}
 	position: absolute;
 	left: 2px;
 	right: 2px;
@@ -200,9 +205,6 @@
 		z-index: 1;
 	}
 
-	.rp-new-comment-ui &-add-comment {
-		display: none;
-	}
 }
 
 .rp-entry-wrapper {
@@ -576,7 +578,7 @@
 		}
 	}
 
-	.rp-size-mini.rp-new-comment-ui &-add-comment {
+	.rp-size-mini &-add-comment {
 		display: none;
 	}
 }