diff --git a/ChangeLog b/ChangeLog
index 833f1e4928..107c4f719f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,21 @@
+Wed Jun  8 01:27:06 2005  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* bignum.c (bignorm): fixed a bug in normalizing negative numbers
+	  reported from Honda Hiroki <hhonda@ipflex.com>.  normalizing
+	  should not trim preceding zeros from negative numbers.
+
+Wed Jun  8 00:15:08 2005  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* ext/socket/socket.c (ruby_getaddrinfo__aix): merged a patch from
+	  KUBO Takehiro <kubo@jiubao.org> to support AIX.  [ruby-list:40832]
+
+Wed Jun  8 00:09:01 2005  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* lib/yaml/rubytypes.rb (Array::to_yaml): merged a patch from
+	  Tilman Sauerbeck <tilman@code-monkey.de>.  [ruby-core:05055]
+
+	* lib/yaml/rubytypes.rb (Hash::to_yaml): ditto.
+
 Wed Jun  8 00:00:01 2005  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* ext/curses/curses.c (curses_insertln): merged a patch from
diff --git a/bignum.c b/bignum.c
index 6a31b5adc1..e534150073 100644
--- a/bignum.c
+++ b/bignum.c
@@ -105,9 +105,15 @@ bignorm(x)
 	BDIGIT *ds = BDIGITS(x);
 
 	while (len-- && !ds[len]) ;
-	RBIGNUM(x)->len = ++len;
+	len++;
+	if (RBIGNUM(x)->sign) {
+	    RBIGNUM(x)->len = len;
+	}
+	else if (len == 0) {
+	    return x;
+	}
 
-	if (len*SIZEOF_BDIGITS <= sizeof(VALUE)) {
+	if (RBIGNUM(x)->len*SIZEOF_BDIGITS <= sizeof(VALUE)) {
 	    long num = 0;
 	    while (len--) {
 		num = BIGUP(num) + ds[len];
diff --git a/error.c b/error.c
index c6f217e5bc..a229ecf1b0 100644
--- a/error.c
+++ b/error.c
@@ -1172,7 +1172,6 @@ void
 rb_sys_fail(mesg)
     const char *mesg;
 {
-    extern int errno;
     int n = errno;
     VALUE arg;
 
diff --git a/ext/socket/extconf.rb b/ext/socket/extconf.rb
index 5e439401ce..747bb35296 100644
--- a/ext/socket/extconf.rb
+++ b/ext/socket/extconf.rb
@@ -155,8 +155,13 @@ main()
     }
     for (ai = aitop; ai; ai = ai->ai_next) {
       if (ai->ai_family == AF_LOCAL) continue;
-      if (ai->ai_addr == NULL ||
-          ai->ai_addrlen == 0 ||
+      if (ai->ai_addr == NULL)
+        goto bad;
+#if defined(_AIX)
+      ai->ai_addr->sa_len = ai->ai_addrlen;
+      ai->ai_addr->sa_family = ai->ai_family;
+#endif
+      if (ai->ai_addrlen == 0 ||
           getnameinfo(ai->ai_addr, ai->ai_addrlen,
                       straddr, sizeof(straddr), strport, sizeof(strport),
                       NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index d4fd620a00..867088f084 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -169,6 +169,30 @@ ruby_getaddrinfo(nodename, servname, hints, res)
 #define getaddrinfo(node,serv,hints,res) ruby_getaddrinfo((node),(serv),(hints),(res))
 #endif
 
+#if defined(_AIX)
+static int
+ruby_getaddrinfo__aix(nodename, servname, hints, res)
+     char *nodename;
+     char *servname;
+     struct addrinfo *hints;
+     struct addrinfo **res;
+{
+    int error = getaddrinfo(nodename, servname, hints, res);
+    struct addrinfo *r;
+    if (error)
+	return error;
+    for (r = *res; r != NULL; r = r->ai_next) {
+	if (r->ai_addr->sa_family == 0)
+	    r->ai_addr->sa_family = r->ai_family;
+	if (r->ai_addr->sa_len == 0)
+	    r->ai_addr->sa_len = r->ai_addrlen;
+    }
+    return 0;
+}
+#undef getaddrinfo
+#define getaddrinfo(node,serv,hints,res) ruby_getaddrinfo__aix((node),(serv),(hints),(res))
+#endif
+
 #ifdef HAVE_CLOSESOCKET
 #undef close
 #define close closesocket
@@ -2504,7 +2528,9 @@ sock_s_getnameinfo(argc, argv)
 		 * 4th element holds numeric form, don't resolve.
 		 * see ipaddr().
 		 */
+#ifdef AI_NUMERICHOST /* AIX 4.3.3 doesn't have AI_NUMERICHOST. */
 		hints.ai_flags |= AI_NUMERICHOST;
+#endif
 	    }
 	}
 	else {
diff --git a/lib/yaml/rubytypes.rb b/lib/yaml/rubytypes.rb
index 2a0c31d990..643b30b22c 100644
--- a/lib/yaml/rubytypes.rb
+++ b/lib/yaml/rubytypes.rb
@@ -77,7 +77,7 @@ hash_proc = Proc.new { |type, val|
 	elsif Hash === val
 	    type, obj_class = YAML.read_type_class( type, Hash )
         if obj_class != Hash
-            o = obj_class.new
+            o = obj_class.allocate
             o.update( val )
             val = o
         end
@@ -236,7 +236,7 @@ array_proc = Proc.new { |type, val|
     if Array === val
         type, obj_class = YAML.read_type_class( type, Array )
         if obj_class != Array
-            o = obj_class.new
+            o = obj_class.allocate
             o.concat( val )
             val = o
         end