diff --git a/mozilla/suite/common/pref/pref-debug.xul b/mozilla/suite/common/pref/pref-debug.xul
index a0d86cbfe77..9d827a51c1f 100644
--- a/mozilla/suite/common/pref/pref-debug.xul
+++ b/mozilla/suite/common/pref/pref-debug.xul
@@ -75,7 +75,6 @@
 				</html:label>
 			</html:div>
 
-
 		</html:fieldset>
 	</box>
 </html:form> 
@@ -133,6 +132,23 @@
 	</box>
 </html:form> 
 
+
+<html:form>
+        <box align="vertical" style="width: 100%;">
+                <html:fieldset style="width: 100%;">
+                        <html:legend align="left">
+                                <html:div>&debugMiscellaneous.label;</html:div>
+                        </html:legend>
+			<html:div>
+				<html:input type="checkbox" id="pref:0:bool:nglayout.debug.disable_xul_cache" />
+				<html:label for="pref:0:bool:nglayout.debug.disable_xul_cache" accesskey="n" tabindex="0">
+				&debugDisableXULCache.label;
+				</html:label>
+			</html:div>
+                </html:fieldset>
+        </box>                
+</html:form>
+
 </html:div>
 </window>
 
diff --git a/mozilla/suite/debugQA/content/pref-debug.xul b/mozilla/suite/debugQA/content/pref-debug.xul
index a0d86cbfe77..9d827a51c1f 100644
--- a/mozilla/suite/debugQA/content/pref-debug.xul
+++ b/mozilla/suite/debugQA/content/pref-debug.xul
@@ -75,7 +75,6 @@
 				</html:label>
 			</html:div>
 
-
 		</html:fieldset>
 	</box>
 </html:form> 
@@ -133,6 +132,23 @@
 	</box>
 </html:form> 
 
+
+<html:form>
+        <box align="vertical" style="width: 100%;">
+                <html:fieldset style="width: 100%;">
+                        <html:legend align="left">
+                                <html:div>&debugMiscellaneous.label;</html:div>
+                        </html:legend>
+			<html:div>
+				<html:input type="checkbox" id="pref:0:bool:nglayout.debug.disable_xul_cache" />
+				<html:label for="pref:0:bool:nglayout.debug.disable_xul_cache" accesskey="n" tabindex="0">
+				&debugDisableXULCache.label;
+				</html:label>
+			</html:div>
+                </html:fieldset>
+        </box>                
+</html:form>
+
 </html:div>
 </window>
 
diff --git a/mozilla/suite/debugQA/locales/en-US/pref-debug.dtd b/mozilla/suite/debugQA/locales/en-US/pref-debug.dtd
index 5c3b9c86209..9f72698890f 100644
--- a/mozilla/suite/debugQA/locales/en-US/pref-debug.dtd
+++ b/mozilla/suite/debugQA/locales/en-US/pref-debug.dtd
@@ -13,7 +13,6 @@
 <!ENTITY gfxWidgets.label "gfx">
 <!ENTITY gfxScrollbars.label "gfx scrollbars">
 
-
 <!-- Event Debugging -->
 <!ENTITY debugEventDebugging.label "Event Debugging">
 <!ENTITY debugPaintFlashing.label "Paint Flashing (Caps-Lock toggles on/off)">
@@ -22,3 +21,7 @@
 <!ENTITY debugEventDumping.label "Event Dumping">
 <!ENTITY debugMotionEventDumping.label "Motion Event Dumping">
 <!ENTITY debugCrossingEventDumping.label "Crossing Event Dumping">
+
+<!-- Miscelleneous -->
+<!ENTITY debugMiscellaneous.label   "Miscelleneous">
+<!ENTITY debugDisableXULCache.label "Disable XUL Cache">
diff --git a/mozilla/suite/locales/en-US/chrome/common/pref/pref-debug.dtd b/mozilla/suite/locales/en-US/chrome/common/pref/pref-debug.dtd
index 5c3b9c86209..9f72698890f 100644
--- a/mozilla/suite/locales/en-US/chrome/common/pref/pref-debug.dtd
+++ b/mozilla/suite/locales/en-US/chrome/common/pref/pref-debug.dtd
@@ -13,7 +13,6 @@
 <!ENTITY gfxWidgets.label "gfx">
 <!ENTITY gfxScrollbars.label "gfx scrollbars">
 
-
 <!-- Event Debugging -->
 <!ENTITY debugEventDebugging.label "Event Debugging">
 <!ENTITY debugPaintFlashing.label "Paint Flashing (Caps-Lock toggles on/off)">
@@ -22,3 +21,7 @@
 <!ENTITY debugEventDumping.label "Event Dumping">
 <!ENTITY debugMotionEventDumping.label "Motion Event Dumping">
 <!ENTITY debugCrossingEventDumping.label "Crossing Event Dumping">
+
+<!-- Miscelleneous -->
+<!ENTITY debugMiscellaneous.label   "Miscelleneous">
+<!ENTITY debugDisableXULCache.label "Disable XUL Cache">
diff --git a/mozilla/xpfe/components/prefwindow/resources/content/pref-debug.xul b/mozilla/xpfe/components/prefwindow/resources/content/pref-debug.xul
index a0d86cbfe77..9d827a51c1f 100644
--- a/mozilla/xpfe/components/prefwindow/resources/content/pref-debug.xul
+++ b/mozilla/xpfe/components/prefwindow/resources/content/pref-debug.xul
@@ -75,7 +75,6 @@
 				</html:label>
 			</html:div>
 
-
 		</html:fieldset>
 	</box>
 </html:form> 
@@ -133,6 +132,23 @@
 	</box>
 </html:form> 
 
+
+<html:form>
+        <box align="vertical" style="width: 100%;">
+                <html:fieldset style="width: 100%;">
+                        <html:legend align="left">
+                                <html:div>&debugMiscellaneous.label;</html:div>
+                        </html:legend>
+			<html:div>
+				<html:input type="checkbox" id="pref:0:bool:nglayout.debug.disable_xul_cache" />
+				<html:label for="pref:0:bool:nglayout.debug.disable_xul_cache" accesskey="n" tabindex="0">
+				&debugDisableXULCache.label;
+				</html:label>
+			</html:div>
+                </html:fieldset>
+        </box>                
+</html:form>
+
 </html:div>
 </window>
 
diff --git a/mozilla/xpfe/components/prefwindow/resources/locale/en-US/pref-debug.dtd b/mozilla/xpfe/components/prefwindow/resources/locale/en-US/pref-debug.dtd
index 5c3b9c86209..9f72698890f 100644
--- a/mozilla/xpfe/components/prefwindow/resources/locale/en-US/pref-debug.dtd
+++ b/mozilla/xpfe/components/prefwindow/resources/locale/en-US/pref-debug.dtd
@@ -13,7 +13,6 @@
 <!ENTITY gfxWidgets.label "gfx">
 <!ENTITY gfxScrollbars.label "gfx scrollbars">
 
-
 <!-- Event Debugging -->
 <!ENTITY debugEventDebugging.label "Event Debugging">
 <!ENTITY debugPaintFlashing.label "Paint Flashing (Caps-Lock toggles on/off)">
@@ -22,3 +21,7 @@
 <!ENTITY debugEventDumping.label "Event Dumping">
 <!ENTITY debugMotionEventDumping.label "Motion Event Dumping">
 <!ENTITY debugCrossingEventDumping.label "Crossing Event Dumping">
+
+<!-- Miscelleneous -->
+<!ENTITY debugMiscellaneous.label   "Miscelleneous">
+<!ENTITY debugDisableXULCache.label "Disable XUL Cache">