5.2.1RC1 out!

だそうで（１・２・３）。
5.2.0から5.2.1RC1までの修正状況は以下の通り。エントリが100近いってのも凄いね。
中には「Zend Memory Manager Improvements」等もあるので重要な修正も含まれています。

--- NEWS	2006/10/30 23:07:28	1.2027.2.547.2.316
+++ NEWS	2006/12/15 01:21:36	1.2027.2.547.2.430
@@ -1,5 +1,193 @@
 PHP                                                                        NEWS
 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
+14 Dec 2006, PHP 5.2.1RC1
+- Added a meta tag to phpinfo() output to prevent search engines from indexing 
+  the page. (Ilia)
+- Added new function, sys_get_temp_dir(). (Hartmut)
+- Added missing object support to file_put_contents(). (Ilia)
+- Changed double-to-string utilities to use BSD implementation. (Dmitry, Tony)
+- Updated bundled libcURL to version 7.16.0 in the Windows distro. (Edin)
+- Updated timezone database to version 2006.16. (Derick)
+- cgi.* and fastcgi.* directives are moved to INI subsystem.
+  The new directive cgi.check_shebang_line can be used to ommiting checnk
+  for "#! /usr/bin/php" line. (Dmitry).
+- Windows related optimizations (Dmitry, Stas)
+  . COM initialization/deinitialization are done only if necessary
+  . removed unnecessary checks for ISREG file and corresponding stat() calls
+  . opendir() is reimplemented using GetFistFile/GetNextFile those are faster
+    then _findfirst/_findnext
+  . implemented registry cache that prevent registry lookup on each request.
+    In case of modification of corresponding registry-tree PHP will reload
+    it automatic
+  . start timeout thread only if necessary
+  . stat() is reimplemented using using GetFileAttributesEx().
+    The new implementation is faster then implementation in MS VC CRT, but
+    it doesn't support Windows 95.
+- Streams optimization (Dmitry)
+  . removed unnecessary ftell() calls (one call for each included PHP file)
+  . disabled calls to read() after EOF
+- Optimized array functions utilizing php_splice(). (Ilia)
+- VCWD_REALPATH() is improved to use realpath cache without VIRTUAL_DIR.
+  (Dmitry)
+- ext/bcmath intialization code is moved from request startup to module
+  startup. (Dmitry)
+- Zend Memory Manager Improvements (Dmitry)
+  . use HeapAlloc() instead of VirtualAlloc()
+  . use "win32" storage manager (instead of "malloc") on Windows by default
+- Zip Extension Improvements (Pierre)
+  . Fixed leak in statName and stateIndex
+  . Fixed return setComment (Hannes)
+  . Added addEmptyDir method
+- Filter Extension Improvements (Ilia, Pierre)
+  . Fixed a bug when callback function returns a non-modified value.
+  . Added filter support for $_SERVER in cgi/apache2 sapis.
+  . Make sure PHP_SELF is filtered in Apache 1 sapi.
+  . Fixed bug #39358 (INSTALL_HEADERS contains incorrect reference to
+    php_filter.h).
+  . Added "default" option that allows a default value to be set for
+    an invalid or missing value.
+  . Invalid filters fails instead of returning unsafe value
+- Fixed FastCGI impersonation for persistent connections on Windows. (Dmitry)
+- Fixed wrong signature initialization in imagepng (Takeshi Abe)
+- Added optimization for imageline with horizontal and vertial lines (Pierre)
+- Fixed bug #39816 (apxs2filter ignores httpd.conf & .htaccess php config
+  settings). (Ilia)
+- Fixed bug #39797 (virtual() does not reset changed INI settings). (Ilia)
+- Fixed bug #39795 (build fails on AIX because crypt_r() uses different data 
+  struct). (Tony)
+- Fixed bug #39791 (Crash in strtotime() on overly long relative date
+  multipliers). (Ilia)
+- Fixed bug #39787 (PHP doesn't work with Apache 2.3). (mv at binarysec dot
+  com).
+- Fixed bug #39782 (setTime() on a DateTime constructed with a Weekday
+  yields incorrect results). (Ilia)
+- Fixed bug #39780 (PNG image with CRC/data error raises fatal error) (Pierre)
+- Fixed bug #39775 ("Indirect modification ..." message is not shown). (Dmitry)
+- Fixed bug #39763 (magic quotes are applied twice by ext/filter in
+  parse_str()). (Ilia) 
+- Fixed bug #39759 (Can't use stored procedures fetching multiple result
+  sets in pdo_mysql). (Ilia)
+- Fixed bug #39754 (Some POSIX extension functions not thread safe).
+  (Ilia, wharmby at uk dot ibm dot com)
+- Fixed bug #39751 (putenv crash on Windows). (KevinJohnHoffman at gmail.com)
+- Fixed bug #39732 (oci_bind_array_by_name doesn't work on Solaris 64bit). 
+  (Tony)
+- Fixed bug #39724 (Broken build due to spl/filter usage of pcre extension).
+  (Tony, Ilia)
+- Fixed bug #39718 (possible crash if assert.callback is set in ini). (Ilia)
+- Fixed bug #39702 (php crashes in the allocator on linux-m68k). (Dmitry)
+- Fixed bug #39673 (file_get_contents causes bus error on certain offsets). 
+  (Tony)
+- Fixed bug #39663 (Memory leak in pg_get_notify() and a possible memory
+  corruption on Windows in pgsql and pdo_pgsql extensions). (Ilia, matteo at
+  beccati dot com)
+- Fixed bug #39662 (Segfault when calling asXML() of a cloned SimpleXMLElement).
+  (Rob, Tony)
+- Fixed bug #39656 (crash when calling fetch() on a PDO statment object
+  after closeCursor()). (Ilia, Tony)
+- Fixed bug #39653 (ext/dba doesn't check for db-4.5 and db-4.4 when db4 
+  support is enabled). (Tony)
+- Fixed bug #39652 (Wrong negative results from memory_get_usage()). (Dmitry)
+- Fixed bug #39648 (Implementation of PHP functions chown() and chgrp() are not
+  thread safe). (Ilia, wharmby at uk dot ibm dot com)
+- Fixed bug #39640 (Segfault with "Allowed memory size exhausted"). (Dmitry)
+- Fixed bug #39625 (Apache crashes on importStylesheet call). (Rob)
+- Fixed bug #39623 (thread safety fixes on *nix for putenv() & mime_magic).
+  (Ilia, wharmby at uk dot ibm dot com)
+- Fixed bug #39621 (str_replace() is not binary safe on strings with equal 
+  length). (Tony)
+- Fixed bug #39613 (Possible segfault in imap initialization due to missing 
+  module dependency). (wharmby at uk dot ibm dot com, Tony)
+- Fixed bug #39606 (Use of com.typelib_file in PHP.ini STILL causes A/V). (Rob)
+- Fixed bug #39602 (Invalid session.save_handler crashes PHP). (Dmitry)
+- Fixed bug #39583 (ftp_put() does not change transfer mode to ASCII). (Tony)
+- Fixed bug #39576 (array_walk() doesn't separate userdata zval). (Tony)
+- Fixed bug #39571 (timeout ssl:// connections). (Ilia)
+- Fixed bug #39564 (PDO::errorInfo() returns inconsistent information when 
+  sqlite3_step() fails). (Tony)
+- Fixed bug #39548 (ZMSG_LOG_SCRIPT_NAME not routed to OutputDebugString()
+  on Windows). (Dmitry)
+- Fixed bug #39538 (fgetcsv can't handle starting newlines and trailing odd
+  number of backslashes). (David Soria Parra, Pierre)
+- Fixed bug #39534 (Error in maths to calculate of
+  ZEND_MM_ALIGNED_MIN_HEADER_SIZE). (wharmby at uk dot ibm dot com, Dmitry)
+- Fixed bug #39527 (Failure to retrieve results when multiple unbuffered,
+  prepared statements are used in pdo_mysql). (Ilia)
+- Fixed bug #39508 (imagefill crashes with small images 3 pixels or less)
+  (Pierre)
+- Fixed bug #39483 (Problem with handling of \ char in prepared statements).
+  (Ilia, suhachov at gmail dot com)
+- Fixed bug #39458 (ftp_nlist() returns false on empty dirs). (Nuno)
+- Fixed bug #39454 (Returning a SOAP array segfaults PHP). (Dmitry)
+- Fixed bug #39445 (Calling debug_backtrace() in the __toString() function
+  produces a crash). (Dmitry)
+- Fixed bug #39438 (Fatal error: Out of memory). (Dmitry)
+- Fixed bug #39414 (Syntax error while compiling with Sun Workshop Complier).
+  (Johannes)
+- Fixed bug #39398 (Booleans are not automatically translated to integers).
+  (Ilia)
+- Fixed bug #39366 (imagerotate does not use alpha with angle > 45A^°) (Pierre)
+- Fixed bug #39364 (Removed warning on empty haystack inside mb_strstr()).
+  (Ilia)
+- Fixed bug #39362 (Added an option to imap_open/imap_reopen to control the 
+  number of connection retries). (Ilia)
+- Fixed bug #39354 (Allow building of curl extension against libcurl 7.16.0)
+  (Ilia) 
+- Fixed bug #39350 (crash with implode("\n", array(false))). (Ilia)
+- Fixed bug #39344 (Unnecessary calls to OnModify callback routine for
+  an extension INI directive). (wharmby at uk dot ibm dot com, Dmitry)
+- Fixed bug #39320 (ZEND_HASH_APPLY_STOP causes deletion). (Marcus)
+- Fixed bug #39313 (spl_autoload triggers Fatal error). (Marcus)
+- Fixed bug #39300 (make install fails if wget is not available). (Tony)
+- Fixed bug #39297 (Memory corruption because of indirect modification
+  of overloaded array). (Dmitry)
+- Fixed bug #39286 (misleading error message when invalid dimensions are
+  given) (Pierre)
+- Fixed bug #39265 (Fixed path handling inside mod_files.sh). 
+  (michal dot taborsky at gmail dot com, Ilia)
+- Fixed bug #39273 (imagecopyresized may ignore alpha channel) (Pierre)
+- Fixed bug #39217 (serialNumber might be -1 when the value is too large)
+  (Pierre, Tony)
+- Fixed bug #39215 (Inappropriate close of stdin/stdout/stderr). (Wez,Ilia)
+- Fixed bug #39201 (Possible crash in Apache 2 with 413 ErrorHandler).
+  (Ilia)
+- Fixed bug #39151 (Parse error in recursiveiteratoriterator.php). (Marcus)
+- Fixed bug #39121 (Incorrect return array handling in non-wsdl soap client).
+  (Dmitry)
+- Fixed bug #39090 (DirectoryFilterDots doxygen docs and example is wrong).
+  (Marcus)
+- Fixed bug #38770 (unpack() broken with longs on 64 bit machines). (Ilia,
+  David Soria Parra).
+- Fixed bug #38698 (for some keys cdbmake creates corrupted db and cdb can't 
+  read valid db). (Marcus)
+- Fixed bug #38680 (Added missing handling of basic types in json_decode).
+  (Ilia) 
+- Fixed bug #38602 (header( "HTTP/1.0 ..." ) does not change proto version).
+  (Ilia)
+- Fixed bug #38536 (SOAP returns an array of values instead of an object).
+  (Dmitry)
+- Fixed bug #38456 (Apache2 segfaults when virtual() is called in .php
+  ErrorDocument). (Ilia)
+- Fixed bug #38319 (Remove bogus warnings from persistent PDO connections).
+  (Ilia)
+- Fixed bug #38274 (Memlimit fatal error sent to "wrong" stderr when using
+  fastcgi). (Dmitry)
+- Fixed bug #38252 (Incorrect PDO error message on invalid default fetch
+  mode). (Ilia)
+- Fixed bug #37773 (iconv_substr() gives "Unknown error" when string length = 1").
+  (Ilia)
+- Fixed bug #37627 (session save_path check checks the parent directory).
+  (Ilia)
+- Fixed bug #36975 (natcasesort() causes array_pop() to misbehave). (Hannes)
+- Fixed bug #36812 (pg_execute() modifies input array). (Ilia)
+- Fixed bug #36798 (Error parsing named parameters with queries containing
+  high-ascii chars). (Ilia)
+- Fixed bug #36644 (possible crash in variant_date_from_timestamp()). (Ilia)
+- Fixed bug #33282 (Re-assignment by reference does not clear the is_ref flag)
+  (Ilia,Dmitry, Matt Wilmas)
+- Fixed bug #29840 (is_executable() does not honor safe_mode_exec_dir
+  setting). (Ilia)
+
 02 Nov 2006, PHP 5.2.0
 - Updated bundled OpenSSL to version 0.9.8d in the Windows distro. (Edin)
 - Updated Postgresql client libraries to 8.1.4 in the Windows distro. (Edin)
@@ -167,6 +355,7 @@
   being applied when RAW filter is used. (Ilia)
 - Fixed memory leaks in openssl streams context options. (Pierre)
 - Fixed handling of extremely long paths inside tempnam() function. (Ilia)
+- Fixed bug #39721 (Runtime inheritance causes data corruption). (Dmitry)
 - Fixed bug #39304 (Segmentation fault with list unpacking of string offset).
   (Dmitry)
 - Fixed bug #39192 (Not including nsapi.h properly with SJSWS 7). This will