diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/DiffTable.ui.xml b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/DiffTable.ui.xml
index 4c8579c..18d497c 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/DiffTable.ui.xml
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/DiffTable.ui.xml
@@ -22,13 +22,15 @@
     @external .CodeMirror-linenumber, .CodeMirror-vscrollbar .CodeMirror-scroll;
     @external .cm-keymap-fat-cursor, CodeMirror-cursor;
     @external .cm-searching, .cm-trailingspace, .cm-tab;
-    .difftable .CodeMirror-lines {
-      padding: 0;
-    }
+
+    .difftable { max-width: 1484px; }
+    .difftable .CodeMirror-lines { padding: 0; }
     .difftable .CodeMirror pre {
       padding: 0;
       padding-bottom: 0.11em;
       overflow: hidden;
+      border-right: 0;
+      width: auto;
     }
     .difftable .CodeMirror pre span {
       padding-bottom: 0.11em;
@@ -41,13 +43,15 @@
       width: 10px;
     }
     .table {
+      width: 100%;
       table-layout: fixed;
       border-spacing: 0;
     }
 
-    .a, .b { padding: 0; }
-    .a { width: 702px; min-width: 702px; }
-    .b { width: 718px; min-width: 718px; }
+    .a, .b {
+      padding: 0;
+      width: 50%;
+    }
 
     /* Hide left side scrollbar, right side controls both views. */
     .a .CodeMirror-scroll { padding-right: 0; }
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/Header.ui.xml b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/Header.ui.xml
index 53402fc..2814a63 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/Header.ui.xml
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/Header.ui.xml
@@ -21,8 +21,7 @@
   <ui:style>
   .header {
     position: relative;
-    width: 1420px;
-    min-width: 1420px;
+    max-width: 1484px;
   }
   .reviewed input {
     margin: 0;
@@ -34,7 +33,7 @@
   .navigation {
     position: absolute;
     top: 0;
-    right: 0;
+    right: 15px;
     font-family: Arial Unicode MS, sans-serif;
   }
   </ui:style>
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/ScrollSynchronizer.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/ScrollSynchronizer.java
index bff8990..f5ae149 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/ScrollSynchronizer.java
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/ScrollSynchronizer.java
@@ -37,8 +37,7 @@
     cmB.on("scroll", new ScrollCallback(cmB, cmA, DisplaySide.B));
   }
 
-  private void updateScreenHeader(CodeMirror cm) {
-    ScrollInfo si = cm.getScrollInfo();
+  private void updateScreenHeader(ScrollInfo si) {
     if (si.getTop() == 0 && !Gerrit.isHeaderVisible()) {
       Gerrit.setHeaderVisible(true);
       diffTable.updateFileCommentVisibility(false);
@@ -77,8 +76,9 @@
         fixup.scheduleRepeating(20);
       }
       if (active == this) {
-        updateScreenHeader(src);
-        dst.scrollToY(src.getScrollInfo().getTop());
+        ScrollInfo si = src.getScrollInfo();
+        updateScreenHeader(si);
+        dst.scrollTo(si.getLeft(), si.getTop());
         state = 0;
       }
     }
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/SideBySide2.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/SideBySide2.java
index 58b476c..7caf76d 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/SideBySide2.java
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/SideBySide2.java
@@ -155,8 +155,8 @@
     // TODO: Re-implement necessary GlobalKey bindings.
     addDomHandler(GlobalKey.STOP_PROPAGATION, KeyPressEvent.getType());
     keysNavigation = new KeyCommandSet(Gerrit.C.sectionNavigation());
-    add(header = new Header(keysNavigation, base, revision, path));
-    add(diffTable = new DiffTable(this, base, revision, path));
+    header = new Header(keysNavigation, base, revision, path);
+    diffTable = new DiffTable(this, base, revision, path);
     add(uiBinder.createAndBindUi(this));
   }
 
@@ -234,8 +234,8 @@
   public void onShowView() {
     super.onShowView();
     resizeCodeMirror();
-
     Window.enableScrolling(false);
+
     cmA.setOption("viewportMargin", 10);
     cmB.setOption("viewportMargin", 10);
     cmB.setCursor(LineCharacter.create(0));
@@ -253,8 +253,13 @@
       resizeHandler.removeHandler();
       resizeHandler = null;
     }
-    cmA.getWrapperElement().removeFromParent();
-    cmB.getWrapperElement().removeFromParent();
+    if (cmA != null) {
+      cmA.getWrapperElement().removeFromParent();
+    }
+    if (cmB != null) {
+      cmB.getWrapperElement().removeFromParent();
+    }
+
     Window.enableScrolling(true);
     Gerrit.setHeaderVisible(true);
   }
@@ -449,7 +454,7 @@
       .set("lineNumbers", true)
       .set("tabSize", pref.getTabSize())
       .set("mode", getContentType(meta))
-      .set("lineWrapping", true)
+      .set("lineWrapping", false)
       .set("styleSelectedText", true)
       .set("showTrailingSpace", pref.isShowWhitespaceErrors())
       .set("keyMap", "vim_ro")