diff --git a/.gitignore b/.gitignore
index 082e3bc..47b31a3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,3 +23,7 @@ otp_src_R14A.tar.gz
 /otp_doc_html_R15B02.tar.gz
 /otp_doc_man_R15B02.tar.gz
 /otp_src_R15B02.tar.gz
+/otp_doc_html_R15B03-1.tar.gz
+/otp_doc_man_R15B03-1.tar.gz
+/otp_src_R15B03-1.readme
+/otp_src_R15B03-1.tar.gz
diff --git a/erlang.spec b/erlang.spec
index 99ba87a..af33811 100644
--- a/erlang.spec
+++ b/erlang.spec
@@ -1,6 +1,6 @@
 %global upstream_ver R15B
 # Do NOT change %%{upstream_rel} unless UPSTREAM has actually changed it!
-%global upstream_rel 02
+%global upstream_rel 03
 #%%global upstream_rel %%{nil}
 # Use %%{nil} for %%{upstream_rel} for tracking source like otp_src_R14B.tar.gz,
 # and 01 %%{upstream_rel} for tracking source like otp_src_R14B01.tar.gz.
@@ -31,11 +31,12 @@ Summary:	General-purpose programming language and runtime environment
 Group:		Development/Languages
 License:	ERPL
 URL:		http://www.erlang.org
-Source0:	http://www.erlang.org/download/otp_src_%{upstream_ver}%{upstream_rel}.tar.gz
+Source0:	http://www.erlang.org/download/otp_src_%{upstream_ver}%{upstream_rel}-1.tar.gz
 %if %{use_prebuilt_docs}
-Source1:	http://erlang.org/download/otp_doc_html_%{upstream_ver}%{upstream_rel}.tar.gz
-Source2:	http://erlang.org/download/otp_doc_man_%{upstream_ver}%{upstream_rel}.tar.gz
+Source1:	http://erlang.org/download/otp_doc_html_%{upstream_ver}%{upstream_rel}-1.tar.gz
+Source2:	http://erlang.org/download/otp_doc_man_%{upstream_ver}%{upstream_rel}-1.tar.gz
 %endif
+Source4:	http://www.erlang.org/download/otp_src_%{upstream_ver}%{upstream_rel}-1.readme
 
 
 # For the source of the Fedora specific patches, see the respective
@@ -1028,8 +1029,9 @@ CFLAGS="$RPM_OPT_FLAGS -mcpu=ultrasparc -fno-strict-aliasing" %configure --enabl
 CFLAGS="$RPM_OPT_FLAGS -fno-strict-aliasing" %configure --enable-shared-zlib
 %endif
 
-# remove pre-built stuff
-make clean
+# FIXME remove pre-built BEAM files
+# some of them are required for compilation
+#find ./lib -type f -name "*.beam" -delete
 
 # GNU Emacs/XEmacs related stuff
 erlang_tools_vsn="$(sed -n 's/TOOLS_VSN = //p' lib/tools/vsn.mk)"
@@ -1405,6 +1407,8 @@ rm -rf $RPM_BUILD_ROOT
 %{_libdir}/erlang/man/man1/diameter_compile.*
 %{_libdir}/erlang/man/man3/diameter.*
 %{_libdir}/erlang/man/man3/diameter_app.*
+%{_libdir}/erlang/man/man3/diameter_codec.*
+%{_libdir}/erlang/man/man3/diameter_make.*
 %{_libdir}/erlang/man/man3/diameter_sctp.*
 %{_libdir}/erlang/man/man3/diameter_tcp.*
 %{_libdir}/erlang/man/man3/diameter_transport.*
@@ -2334,6 +2338,9 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Fri Dec 21 2012 Peter Lemenkov <lemenkov@gmail.com> - R15B-03.1
+- Ver. R15B03 (actually R15B03-1)
+
 * Mon Sep 10 2012 Peter Lemenkov <lemenkov@gmail.com> - R15B-02.1
 - Ver. R15B02
 
diff --git a/otp-0007-Do-not-install-erlang-sources.patch b/otp-0007-Do-not-install-erlang-sources.patch
index e238049..457c781 100644
--- a/otp-0007-Do-not-install-erlang-sources.patch
+++ b/otp-0007-Do-not-install-erlang-sources.patch
@@ -125,10 +125,10 @@ index 4bd49aa..b6d4880 100644
  	$(INSTALL_DATA) $(EXAMPLES) "$(RELSYSDIR)/examples"
  
 diff --git a/lib/common_test/src/Makefile b/lib/common_test/src/Makefile
-index f7dce19..ee75f6e 100644
+index dd2923e..246d30a 100644
 --- a/lib/common_test/src/Makefile
 +++ b/lib/common_test/src/Makefile
-@@ -138,7 +138,7 @@ include $(ERL_TOP)/make/otp_release_targets.mk
+@@ -139,7 +139,7 @@ include $(ERL_TOP)/make/otp_release_targets.mk
  
  release_spec: opt
  	$(INSTALL_DIR) "$(RELSYSDIR)/src"
@@ -288,10 +288,10 @@ index 63cc1c9..af956d9 100644
  	$(INSTALL_DIR) "$(RELSYSDIR)/ebin"
  	$(INSTALL_DATA) $(INSTALL_FILES) "$(RELSYSDIR)/ebin"
 diff --git a/lib/diameter/src/Makefile b/lib/diameter/src/Makefile
-index 99c3432..d79b3af 100644
+index 060659b..5e91d0f 100644
 --- a/lib/diameter/src/Makefile
 +++ b/lib/diameter/src/Makefile
-@@ -231,11 +231,8 @@ release_spec: opt
+@@ -222,11 +222,8 @@ release_spec: opt
  	$(MAKE) $(EXAMPLE_DIRS:%/=release_examples_%)
  
  $(TARGET_DIRS:%/=release_src_%): release_src_%:
diff --git a/sources b/sources
index ba69c1d..e64519f 100644
--- a/sources
+++ b/sources
@@ -1,9 +1,4 @@
-80553f4730b04aad4c9994590bad3fe6  otp_doc_html_R15B.tar.gz
-9738da523737712a9db87db0dee05338  otp_doc_man_R15B.tar.gz
-dd6c2a4807551b4a8a536067bde31d73  otp_src_R15B.tar.gz
-7569cae680eecd64e7e5d952be788ee5  otp_doc_html_R15B01.tar.gz
-d87412c2a1e6005bbe29dfe642a9ca20  otp_doc_man_R15B01.tar.gz
-f12d00f6e62b36ad027d6c0c08905fad  otp_src_R15B01.tar.gz
-36d91f123204f4c71a464985b1b2a375  otp_doc_html_R15B02.tar.gz
-974020ba533242fca759a7f5eaf628e5  otp_doc_man_R15B02.tar.gz
-ccbe5e032a2afe2390de8913bfe737a1  otp_src_R15B02.tar.gz
+18ba57d24085a77c01bf05f5bc0e6fb5  otp_doc_html_R15B03-1.tar.gz
+1d7ace92e8cf41abbee1dba8192b7d5f  otp_doc_man_R15B03-1.tar.gz
+f299c8af6f54e4b767fbba100b18acf2  otp_src_R15B03-1.readme
+eccd1e6dda6132993555e088005019f2  otp_src_R15B03-1.tar.gz