diff --git a/CleanSpec.mk b/CleanSpec.mk
index 5240837..62a3a09 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -102,6 +102,7 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/JAVA_LIBRARIES/*)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/framework/*)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
diff --git a/core/Makefile b/core/Makefile
index ba243ff..a81c981 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -16,10 +16,16 @@
 # e.g., "system/etc/file.xml".
 # The filter part means "only eval the copy-one-file rule if this
 # src:dest pair is the first one to match the same dest"
+#$(1): the src:dest pair
+define check-product-copy-files
+$(if $(filter %.apk, $(1)),$(error \
+    Prebuilt apk found in PRODUCT_COPY_FILES: $(1), use BUILD_PREBUILT instead!))
+endef
 unique_product_copy_files_destinations :=
 $(foreach cf,$(PRODUCT_COPY_FILES), \
     $(eval _src := $(call word-colon,1,$(cf))) \
     $(eval _dest := $(call word-colon,2,$(cf))) \
+    $(call check-product-copy-files,$(cf)) \
     $(if $(filter $(unique_product_copy_files_destinations),$(_dest)),, \
         $(eval _fulldest := $(call append-path,$(PRODUCT_OUT),$(_dest))) \
         $(eval $(call copy-one-file,$(_src),$(_fulldest))) \
@@ -241,6 +247,8 @@
 	         private_key=""' >> $@;,\
 	    echo 'name="$(p).apk" certificate="$(PACKAGES.$(p).CERTIFICATE)" \
 	         private_key="$(PACKAGES.$(p).PRIVATE_KEY)"' >> $@;))
+	# In case $(PACKAGES) is empty.
+	$(hide) touch $@
 
 .PHONY: apkcerts-list
 apkcerts-list: $(APKCERTS_FILE)
@@ -995,6 +1003,7 @@
 	$(call intermediates-dir-for,EXECUTABLES,applypatch)/applypatch \
 	$(call intermediates-dir-for,EXECUTABLES,applypatch_static)/applypatch_static \
 	$(call intermediates-dir-for,EXECUTABLES,check_prereq)/check_prereq \
+	$(call intermediates-dir-for,EXECUTABLES,sqlite3)/sqlite3 \
 	$(call intermediates-dir-for,EXECUTABLES,updater)/updater
 $(BUILT_TARGET_FILES_PACKAGE): PRIVATE_OTA_TOOLS := $(built_ota_tools)
 
diff --git a/core/build_id.mk b/core/build_id.mk
index 51ab603..e415e8d 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -1,4 +1,3 @@
-
 #
 # Copyright (C) 2008 The Android Open Source Project
 #
@@ -14,9 +13,20 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+
+#
+# Defines branch-specific values.
+#
+
 # BUILD_ID is usually used to specify the branch name
 # (like "MAIN") or a branch name and a release candidate
-# (like "CRB01").  It must be a single word, and is
+# (like "TC1-RC5").  It must be a single word, and is
 # capitalized by convention.
+#
+BUILD_ID := ICS_FACTORYROM
 
-export BUILD_ID=IFL09
+# DISPLAY_BUILD_NUMBER should only be set for development branches,
+# If set, the BUILD_NUMBER (cl) is appended to the BUILD_ID for
+# a more descriptive BUILD_ID_DISPLAY, otherwise BUILD_ID_DISPLAY
+# is the same as BUILD_ID
+DISPLAY_BUILD_NUMBER := true
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 8c5a40e..643a138 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -93,6 +93,7 @@
 LOCAL_DX_FLAGS:=
 LOCAL_CERTIFICATE:=
 LOCAL_SDK_VERSION:=
+LOCAL_SDK_RES_VERSION:=
 LOCAL_NDK_VERSION:=
 LOCAL_NDK_STL_VARIANT:=
 LOCAL_NO_EMMA_INSTRUMENT:=
diff --git a/core/package.mk b/core/package.mk
index 7bc5be4..398e487 100644
--- a/core/package.mk
+++ b/core/package.mk
@@ -161,6 +161,11 @@
 include $(BUILD_SYSTEM)/java.mk
 #################################
 
+LOCAL_SDK_RES_VERSION:=$(strip $(LOCAL_SDK_RES_VERSION))
+ifeq ($(LOCAL_SDK_RES_VERSION),)
+  LOCAL_SDK_RES_VERSION:=$(LOCAL_SDK_VERSION)
+endif
+
 full_android_manifest := $(LOCAL_PATH)/$(LOCAL_MANIFEST_FILE)
 $(LOCAL_INTERMEDIATE_TARGETS): \
     PRIVATE_ANDROID_MANIFEST := $(full_android_manifest)
@@ -250,12 +255,12 @@
 # Most packages should link against the resources defined by framework-res.
 # Even if they don't have their own resources, they may use framework
 # resources.
-ifneq ($(filter-out current,$(LOCAL_SDK_VERSION)),)
+ifneq ($(filter-out current,$(LOCAL_SDK_RES_VERSION)),)
 # for released sdk versions, the platform resources were built into android.jar.
 framework_res_package_export := \
-    $(HISTORICAL_SDK_VERSIONS_ROOT)/$(LOCAL_SDK_VERSION)/android.jar
+    $(HISTORICAL_SDK_VERSIONS_ROOT)/$(LOCAL_SDK_RES_VERSION)/android.jar
 framework_res_package_export_deps := $(framework_res_package_export)
-else # LOCAL_SDK_VERSION
+else # LOCAL_SDK_RES_VERSION
 framework_res_package_export := \
     $(call intermediates-dir-for,APPS,framework-res,,COMMON)/package-export.apk
 # We can't depend directly on the export.apk file; it won't get its
@@ -263,7 +268,7 @@
 # corresponding R.stamp file, which lists the export.apk as a dependency.
 framework_res_package_export_deps := \
     $(dir $(framework_res_package_export))src/R.stamp
-endif # LOCAL_SDK_VERSION
+endif # LOCAL_SDK_RES_VERSION
 $(R_file_stamp): $(framework_res_package_export_deps)
 $(LOCAL_INTERMEDIATE_TARGETS): \
     PRIVATE_AAPT_INCLUDES := $(framework_res_package_export)
diff --git a/core/tasks/sdk-addon.mk b/core/tasks/sdk-addon.mk
index 797314a..f3aec65 100644
--- a/core/tasks/sdk-addon.mk
+++ b/core/tasks/sdk-addon.mk
@@ -58,6 +58,7 @@
         $(BUILT_SYSTEMIMAGE):images/$(TARGET_CPU_ABI)/system.img \
         $(BUILT_USERDATAIMAGE_TARGET):images/$(TARGET_CPU_ABI)/userdata.img \
         $(BUILT_RAMDISK_TARGET):images/$(TARGET_CPU_ABI)/ramdisk.img \
+        $(PRODUCT_OUT)/system/build.prop:images/$(TARGET_CPU_ABI)/build.prop \
         $(target_notice_file_txt):images/$(TARGET_CPU_ABI)/NOTICE.txt
 
 # Generate rules to copy the requested files
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 15176b9..6773635 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -41,7 +41,7 @@
   # which is the version that we reveal to the end user.
   # Update this value when the platform version changes (rather
   # than overriding it somewhere else).  Can be an arbitrary string.
-  PLATFORM_VERSION := 4.0
+  PLATFORM_VERSION := 4.0.1
 endif
 
 ifeq "" "$(PLATFORM_SDK_VERSION)"
diff --git a/target/board/generic/device.mk b/target/board/generic/device.mk
index f57a0dc..8b187d5 100644
--- a/target/board/generic/device.mk
+++ b/target/board/generic/device.mk
@@ -23,7 +23,8 @@
 
 PRODUCT_COPY_FILES := \
     development/data/etc/apns-conf.xml:system/etc/apns-conf.xml \
-    development/data/etc/vold.conf:system/etc/vold.conf
+    development/data/etc/vold.conf:system/etc/vold.conf \
+    development/tools/emulator/system/camera/media_profiles.xml:system/etc/media_profiles.xml \
 
 PRODUCT_PACKAGES := \
     audio.primary.goldfish
diff --git a/target/board/generic_x86/device.mk b/target/board/generic_x86/device.mk
index 0b4dc27..1055cba 100644
--- a/target/board/generic_x86/device.mk
+++ b/target/board/generic_x86/device.mk
@@ -23,4 +23,5 @@
 
 PRODUCT_COPY_FILES := \
     development/data/etc/apns-conf.xml:system/etc/apns-conf.xml \
-    development/data/etc/vold.conf:system/etc/vold.conf
+    development/data/etc/vold.conf:system/etc/vold.conf \
+    development/tools/emulator/system/camera/media_profiles.xml:system/etc/media_profiles.xml \
diff --git a/target/board/vbox_x86/device.mk b/target/board/vbox_x86/device.mk
index a028b98..a76d8fa 100644
--- a/target/board/vbox_x86/device.mk
+++ b/target/board/vbox_x86/device.mk
@@ -28,6 +28,7 @@
 PRODUCT_COPY_FILES := \
     development/data/etc/apns-conf.xml:system/etc/apns-conf.xml \
     development/data/etc/vold.conf:system/etc/vold.conf \
+    development/tools/emulator/system/camera/media_profiles.xml:system/etc/media_profiles.xml \
     build/target/board/vbox_x86/init.rc:root/init.rc \
     build/target/board/vbox_x86/init.vbox_x86.rc:root/init.vbox_x86.rc \
     $(LOCAL_KERNEL):kernel
diff --git a/target/product/sdk.mk b/target/product/sdk.mk
index 05aba8d..f0142fa 100644
--- a/target/product/sdk.mk
+++ b/target/product/sdk.mk
@@ -153,10 +153,11 @@
 # locale + densities. en_US is both first and in alphabetical order to
 # ensure this is the default locale.
 PRODUCT_LOCALES = \
+	en_US \
 	ldpi \
 	hdpi \
 	mdpi \
-	en_US \
+	xhdpi \
 	ar_EG \
 	ar_IL \
 	bg_BG \
diff --git a/tools/droiddoc/templates-sdk/assets/android-developer-core.css b/tools/droiddoc/templates-sdk/assets/android-developer-core.css
index 565f173..f548a6c 100644
--- a/tools/droiddoc/templates-sdk/assets/android-developer-core.css
+++ b/tools/droiddoc/templates-sdk/assets/android-developer-core.css
@@ -649,6 +649,7 @@
 #doc-content .gsc-tabHeader {
   padding: 3px 6px;
   position:relative;
+  width:auto;
 }
 
 #doc-content .gsc-tabHeader.gsc-tabhActive {
diff --git a/tools/droiddoc/templates-sdk/assets/android-developer-docs.css b/tools/droiddoc/templates-sdk/assets/android-developer-docs.css
index 3af4eb1..20871b9 100644
--- a/tools/droiddoc/templates-sdk/assets/android-developer-docs.css
+++ b/tools/droiddoc/templates-sdk/assets/android-developer-docs.css
@@ -718,6 +718,17 @@
   padding:0;
 }
 
+#jd-content div.special.reference h2,
+#jd-content div.special.reference h3,
+#jd-content div.special.reference h4 {
+  color:#000;
+  font-size:1em;
+  border:none;
+  font-weight:bold;
+  margin:.5em 0;
+  padding:0;
+}
+
 p.note, div.note,
 p.caution, div.caution,
 p.warning, div.warning {
diff --git a/tools/droiddoc/templates-sdk/assets/android-developer-docs.js b/tools/droiddoc/templates-sdk/assets/android-developer-docs.js
index 153f5e0..0cac2fc 100644
--- a/tools/droiddoc/templates-sdk/assets/android-developer-docs.js
+++ b/tools/droiddoc/templates-sdk/assets/android-developer-docs.js
@@ -232,6 +232,9 @@
         if (tags[j] == 'new') {
           listItemNode.get(0).innerHTML += '&nbsp;<span class="new">new!</span>';
           break;
+        } else if (tags[j] == 'updated') {
+          listItemNode.get(0).innerHTML += '&nbsp;<span class="new">updated!</span>';
+          break;
         }
       }
       listNode.append(listItemNode);
diff --git a/tools/droiddoc/templates-sdk/assets/android-developer-reference.js b/tools/droiddoc/templates-sdk/assets/android-developer-reference.js
index 5561cc9..ba47d4d 100644
--- a/tools/droiddoc/templates-sdk/assets/android-developer-reference.js
+++ b/tools/droiddoc/templates-sdk/assets/android-developer-reference.js
@@ -38,7 +38,9 @@
 
   minLevel = parseInt($("body").attr("class"));
   // Handle provisional api levels; the provisional level will always be the highest possible level
-  if (isNaN(minLevel)) {
+  // Provisional api levels will also have a length; other stuff that's just missing a level won't,
+  // so leave those kinds of entities at the default level of 1 (for example, the R.styleable class)
+  if (isNaN(minLevel) && minLevel.length) {
     minLevel = maxLevel;
   }
   var select = $("#apiLevelSelector").html("").change(changeApiLevel);
diff --git a/tools/droiddoc/templates-sdk/assets/images/home/ics-android.png b/tools/droiddoc/templates-sdk/assets/images/home/ics-android.png
new file mode 100644
index 0000000..be62ca8
--- /dev/null
+++ b/tools/droiddoc/templates-sdk/assets/images/home/ics-android.png
Binary files differ