diff --git a/ChangeLog b/ChangeLog
index fe4f424707..2d85de32e1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Apr 13 10:58:54 2009  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* sprintf.c (rb_str_format): check encoding compatibility only on
+	  real parts.
+
 Sun Apr 12 19:54:56 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* dir.c (bracket, fnmatch_helper): compare bytewise first, to get
diff --git a/sprintf.c b/sprintf.c
index 9f3183a0ee..2bcf138c27 100644
--- a/sprintf.c
+++ b/sprintf.c
@@ -660,7 +660,7 @@ rb_str_format(int argc, const VALUE *argv, VALUE fmt)
 		str = rb_obj_as_string(arg);
 		if (OBJ_TAINTED(str)) tainted = 1;
 		len = RSTRING_LEN(str);
-		enc = rb_enc_check(result, str);
+		enc = rb_enc_check(rb_str_substr(result, 0, blen), str);
 		if (flags&(FPREC|FWIDTH)) {
 		    slen = rb_enc_strlen(RSTRING_PTR(str),RSTRING_END(str),enc);
 		    if (slen < 0) {
diff --git a/version.h b/version.h
index 44ede70790..4840f2bcee 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.2"
-#define RUBY_RELEASE_DATE "2009-04-12"
+#define RUBY_RELEASE_DATE "2009-04-13"
 #define RUBY_PATCHLEVEL -1
 #define RUBY_BRANCH_NAME "trunk"
 
@@ -8,7 +8,7 @@
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_YEAR 2009
 #define RUBY_RELEASE_MONTH 4
-#define RUBY_RELEASE_DAY 12
+#define RUBY_RELEASE_DAY 13
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];