diff --git a/res/xml/font_preferences.xml b/res/xml/font_preferences.xml
index cce4a7007..fd2c340b4 100644
--- a/res/xml/font_preferences.xml
+++ b/res/xml/font_preferences.xml
@@ -137,7 +137,7 @@
             android:entryValues="@array/font_values"
             android:dialogTitle="@string/font_size_message_view_date" />
 
-          <ListPreference
+        <ListPreference
             android:persistent="false"
             android:key="message_view_additional_headers_font"
             android:title="@string/font_size_message_view_additional_headers"
@@ -145,14 +145,6 @@
             android:entryValues="@array/font_values"
             android:dialogTitle="@string/font_size_message_view_additional_headers" />
 
-        <ListPreference
-            android:persistent="false"
-            android:key="message_view_content_font"
-            android:title="@string/font_size_message_view_content"
-            android:entries="@array/font_entries_webview"
-            android:entryValues="@array/font_values_webview"
-            android:dialogTitle="@string/font_size_message_view_content" />
-
         <com.fsck.k9.activity.setup.SliderPreference
             android:persistent="false"
             android:key="message_view_content_font_slider"
diff --git a/src/com/fsck/k9/FontSizes.java b/src/com/fsck/k9/FontSizes.java
index 7e262bf4c..11b6693fc 100644
--- a/src/com/fsck/k9/FontSizes.java
+++ b/src/com/fsck/k9/FontSizes.java
@@ -2,9 +2,10 @@ package com.fsck.k9;
 
 import android.content.SharedPreferences;
 import android.util.TypedValue;
-import android.webkit.WebSettings.TextSize;
 import android.widget.TextView;
 
+import com.fsck.k9.preferences.GlobalSettings;
+
 /**
  * Manage font size of the information displayed in the account list, folder
  * list, message list and in the message view.
@@ -114,18 +115,8 @@ public class FontSizes {
      */
     private int messageViewDate;
 
-    /**
-     * Font size of the message content in the message view activity.
-     *
-     * Note: The unit is WebSettings.TextSize, this option is used only on Android 3.2 (API level 13) and below.
-     */
-    private TextSize messageViewContent = TextSize.NORMAL;
-
-
     /**
      * Font size of the message content in the message view activity, as percent from default size.
-     *
-     * Note: This option is used only on Android 4.0 (API level 14) and above.
      */
     private int messageViewContentPercent;
 
@@ -184,7 +175,6 @@ public class FontSizes {
         editor.putInt(MESSAGE_VIEW_ADDITIONAL_HEADERS, messageViewAdditionalHeaders);
         editor.putInt(MESSAGE_VIEW_SUBJECT, messageViewSubject);
         editor.putInt(MESSAGE_VIEW_DATE, messageViewDate);
-        editor.putInt(MESSAGE_VIEW_CONTENT, getMessageViewContentAsInt());
         editor.putInt(MESSAGE_VIEW_CONTENT_PERCENT, getMessageViewContentAsPercent());
 
         editor.putInt(MESSAGE_COMPOSE_INPUT, messageComposeInput);
@@ -213,12 +203,22 @@ public class FontSizes {
         messageViewAdditionalHeaders = prefs.getInt(MESSAGE_VIEW_ADDITIONAL_HEADERS, messageViewAdditionalHeaders);
         messageViewSubject = prefs.getInt(MESSAGE_VIEW_SUBJECT, messageViewSubject);
         messageViewDate = prefs.getInt(MESSAGE_VIEW_DATE, messageViewDate);
-        setMessageViewContent(prefs.getInt(MESSAGE_VIEW_CONTENT, 3));
-        setMessageViewContentAsPercent(prefs.getInt(MESSAGE_VIEW_CONTENT_PERCENT, 100));
+
+        loadMessageViewContentPercent(prefs);
 
         messageComposeInput = prefs.getInt(MESSAGE_COMPOSE_INPUT, messageComposeInput);
     }
 
+    private void loadMessageViewContentPercent(SharedPreferences prefs) {
+        int fallbackValue = 100;
+        if (!prefs.contains(MESSAGE_VIEW_CONTENT_PERCENT)) {
+            int oldValue = prefs.getInt(MESSAGE_VIEW_CONTENT, 3);
+            fallbackValue = GlobalSettings.SettingsUpgraderV31.convertFromOldSize(oldValue);
+        }
+
+        setMessageViewContentAsPercent(prefs.getInt(MESSAGE_VIEW_CONTENT_PERCENT, fallbackValue));
+    }
+
     public int getAccountName() {
         return accountName;
     }
@@ -331,46 +331,6 @@ public class FontSizes {
         this.messageViewDate = messageViewDate;
     }
 
-    public TextSize getMessageViewContent() {
-        return messageViewContent;
-    }
-
-    public int getMessageViewContentAsInt() {
-        switch (messageViewContent) {
-        case SMALLEST:
-            return 1;
-        case SMALLER:
-            return 2;
-        default:
-        case NORMAL:
-            return 3;
-        case LARGER:
-            return 4;
-        case LARGEST:
-            return 5;
-        }
-    }
-
-    public void setMessageViewContent(int size) {
-        switch (size) {
-        case 1:
-            messageViewContent = TextSize.SMALLEST;
-            break;
-        case 2:
-            messageViewContent = TextSize.SMALLER;
-            break;
-        case 3:
-            messageViewContent = TextSize.NORMAL;
-            break;
-        case 4:
-            messageViewContent = TextSize.LARGER;
-            break;
-        case 5:
-            messageViewContent = TextSize.LARGEST;
-            break;
-        }
-    }
-
     public int getMessageViewContentAsPercent() {
         return messageViewContentPercent;
     }
@@ -394,4 +354,4 @@ public class FontSizes {
             v.setTextSize(TypedValue.COMPLEX_UNIT_SP, fontSize);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/com/fsck/k9/activity/setup/FontSizeSettings.java b/src/com/fsck/k9/activity/setup/FontSizeSettings.java
index b065b89ec..2a208344f 100644
--- a/src/com/fsck/k9/activity/setup/FontSizeSettings.java
+++ b/src/com/fsck/k9/activity/setup/FontSizeSettings.java
@@ -19,7 +19,6 @@ public class FontSizeSettings extends K9PreferenceActivity {
     /*
      * Keys of the preferences defined in res/xml/font_preferences.xml
      */
-    private static final String PREFERENCE_SCREEN_MESSAGE_VIEW_FONTS = "message_view_fonts";
     private static final String PREFERENCE_ACCOUNT_NAME_FONT = "account_name_font";
     private static final String PREFERENCE_ACCOUNT_DESCRIPTION_FONT = "account_description_font";
     private static final String PREFERENCE_FOLDER_NAME_FONT = "folder_name_font";
@@ -34,7 +33,6 @@ public class FontSizeSettings extends K9PreferenceActivity {
     private static final String PREFERENCE_MESSAGE_VIEW_ADDITIONAL_HEADERS_FONT = "message_view_additional_headers_font";
     private static final String PREFERENCE_MESSAGE_VIEW_SUBJECT_FONT = "message_view_subject_font";
     private static final String PREFERENCE_MESSAGE_VIEW_DATE_FONT = "message_view_date_font";
-    private static final String PREFERENCE_MESSAGE_VIEW_CONTENT_FONT = "message_view_content_font";
     private static final String PREFERENCE_MESSAGE_VIEW_CONTENT_FONT_SLIDER = "message_view_content_font_slider";
     private static final String PREFERENCE_MESSAGE_COMPOSE_INPUT_FONT = "message_compose_input_font";
 
@@ -52,7 +50,6 @@ public class FontSizeSettings extends K9PreferenceActivity {
     private ListPreference mMessageViewAdditionalHeaders;
     private ListPreference mMessageViewSubject;
     private ListPreference mMessageViewDate;
-    private ListPreference mMessageViewContent;
     private SliderPreference mMessageViewContentSlider;
     private ListPreference mMessageComposeInput;
 
@@ -121,9 +118,6 @@ public class FontSizeSettings extends K9PreferenceActivity {
         mMessageViewDate = setupListPreference(
                                PREFERENCE_MESSAGE_VIEW_DATE_FONT,
                                Integer.toString(fontSizes.getMessageViewDate()));
-        mMessageViewContent = setupListPreference(
-                                  PREFERENCE_MESSAGE_VIEW_CONTENT_FONT,
-                                  Integer.toString(fontSizes.getMessageViewContentAsInt()));
 
         mMessageViewContentSlider = (SliderPreference) findPreference(
                                   PREFERENCE_MESSAGE_VIEW_CONTENT_FONT_SLIDER);
@@ -152,14 +146,6 @@ public class FontSizeSettings extends K9PreferenceActivity {
         mMessageViewContentSlider.getOnPreferenceChangeListener().onPreferenceChange(
                                   mMessageViewContentSlider, new Float(mMessageViewContentSlider.getValue()));
 
-        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
-            ((PreferenceGroup) findPreference(PREFERENCE_SCREEN_MESSAGE_VIEW_FONTS)).
-                removePreference(mMessageViewContent);
-        } else {
-            ((PreferenceGroup) findPreference(PREFERENCE_SCREEN_MESSAGE_VIEW_FONTS)).
-                removePreference(mMessageViewContentSlider);
-        }
-
         mMessageComposeInput = setupListPreference(
                 PREFERENCE_MESSAGE_COMPOSE_INPUT_FONT,
                 Integer.toString(fontSizes.getMessageComposeInput()));
@@ -189,7 +175,6 @@ public class FontSizeSettings extends K9PreferenceActivity {
         fontSizes.setMessageViewAdditionalHeaders(Integer.parseInt(mMessageViewAdditionalHeaders.getValue()));
         fontSizes.setMessageViewSubject(Integer.parseInt(mMessageViewSubject.getValue()));
         fontSizes.setMessageViewDate(Integer.parseInt(mMessageViewDate.getValue()));
-        fontSizes.setMessageViewContent(Integer.parseInt(mMessageViewContent.getValue()));
         // Scale from [0, 1]
         fontSizes.setMessageViewContentAsPercent((int)(FONT_PERCENT_MIN +
                                 mMessageViewContentSlider.getValue() *
diff --git a/src/com/fsck/k9/preferences/GlobalSettings.java b/src/com/fsck/k9/preferences/GlobalSettings.java
index 79066d7d6..a55da2662 100644
--- a/src/com/fsck/k9/preferences/GlobalSettings.java
+++ b/src/com/fsck/k9/preferences/GlobalSettings.java
@@ -101,7 +101,8 @@ public class GlobalSettings {
                 new V(1, new FontSizeSetting(FontSizes.FONT_DEFAULT))
             ));
         s.put("fontSizeMessageViewContent", Settings.versions(
-                new V(1, new WebFontSizeSetting(3))
+                new V(1, new WebFontSizeSetting(3)),
+                new V(31, null)
             ));
         s.put("fontSizeMessageViewDate", Settings.versions(
                 new V(1, new FontSizeSetting(FontSizes.FONT_DEFAULT))
@@ -245,12 +246,16 @@ public class GlobalSettings {
         s.put("messageViewSpamActionVisible", Settings.versions(
                 new V(30, new BooleanSetting(false))
             ));
+        s.put("fontSizeMessageViewContentPercent", Settings.versions(
+                new V(31, new IntegerRangeSetting(40, 250, 100))
+            ));
 
         SETTINGS = Collections.unmodifiableMap(s);
 
         Map<Integer, SettingsUpgrader> u = new HashMap<Integer, SettingsUpgrader>();
         u.put(12, new SettingsUpgraderV12());
         u.put(24, new SettingsUpgraderV24());
+        u.put(31, new SettingsUpgraderV31());
 
         UPGRADERS = Collections.unmodifiableMap(u);
     }
@@ -321,6 +326,49 @@ public class GlobalSettings {
         }
     }
 
+    /**
+     * Upgrades the settings from version 30 to 31.
+     *
+     * <p>
+     * Convert value from <em>fontSizeMessageViewContent</em> to
+     * <em>fontSizeMessageViewContentPercent</em>.
+     * </p>
+     */
+    public static class SettingsUpgraderV31 implements SettingsUpgrader {
+
+        @Override
+        public Set<String> upgrade(Map<String, Object> settings) {
+            int oldSize = ((Integer) settings.get("fontSizeMessageViewContent")).intValue();
+
+            int newSize = convertFromOldSize(oldSize);
+
+            settings.put("fontSizeMessageViewContentPercent", newSize);
+
+            return new HashSet<String>(Arrays.asList("fontSizeMessageViewContent"));
+        }
+
+        public static int convertFromOldSize(int oldSize) {
+            switch (oldSize) {
+                case 1: {
+                    return 40;
+                }
+                case 2: {
+                    return 75;
+                }
+                case 4: {
+                    return 175;
+                }
+                case 5: {
+                    return 250;
+                }
+                case 3:
+                default: {
+                    return 100;
+                }
+            }
+        }
+    }
+
     /**
      * The gallery bug work-around setting.
      *
diff --git a/src/com/fsck/k9/preferences/Settings.java b/src/com/fsck/k9/preferences/Settings.java
index 127865ee8..11ecc921a 100644
--- a/src/com/fsck/k9/preferences/Settings.java
+++ b/src/com/fsck/k9/preferences/Settings.java
@@ -35,7 +35,7 @@ public class Settings {
      *
      * @see SettingsExporter
      */
-    public static final int VERSION = 30;
+    public static final int VERSION = 31;
 
     public static Map<String, Object> validate(int version, Map<String,
             TreeMap<Integer, SettingsDescription>> settings,
diff --git a/src/com/fsck/k9/view/MessageWebView.java b/src/com/fsck/k9/view/MessageWebView.java
index 192165dcd..0e37c069c 100644
--- a/src/com/fsck/k9/view/MessageWebView.java
+++ b/src/com/fsck/k9/view/MessageWebView.java
@@ -109,15 +109,10 @@ public class MessageWebView extends RigidWebView {
 
         disableOverscrolling();
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
-            webSettings.setTextZoom(K9.getFontSizes().getMessageViewContentAsPercent());
-        } else {
-            webSettings.setTextSize(K9.getFontSizes().getMessageViewContent());
-        }
+        webSettings.setTextZoom(K9.getFontSizes().getMessageViewContentAsPercent());
 
         // Disable network images by default.  This is overridden by preferences.
         blockNetworkData(true);
-
     }
 
     /**