Extensions are fine for me with 5.5.0a5-NTS on Windows7, but the following extensions are missing on 5.5.0a5-TS:
bz2
exif
fileinfo
gd
gettext
imap
intl
mysql
mysqli
pdo_mysql
pdo_pgsql
pgsql
openssl
soap
wddx
xmlrpc

The TS and NTS builds of 5.4.12 and 5.3.22 all have all the extensions though (so its only a 5.5.0a5-TS problem).

I have TS and:

;extension=php_bz2.dll
extension=php_com_dotnet.dll
;extension=php_curl.dll
;extension=php_fileinfo.dll
extension=php_gd2.dll
;extension=php_gettext.dll
;extension=php_gmp.dll
;extension=php_intl.dll
;extension=php_imap.dll
;extension=php_interbase.dll
;extension=php_ldap.dll
extension=php_mbstring.dll
;extension=php_exif.dll      ; Must be after mbstring as it depends on it
;extension=php_mysql.dll
;extension=php_mysqli.dll
;extension=php_oci8.dll      ; Use with Oracle 10gR2 Instant Client
;extension=php_oci8_11g.dll  ; Use with Oracle 11gR2 Instant Client
;extension=php_openssl.dll
;extension=php_pdo_firebird.dll
;extension=php_pdo_mysql.dll
;extension=php_pdo_oci.dll
;extension=php_pdo_odbc.dll
;extension=php_pdo_pgsql.dll
;extension=php_pdo_sqlite.dll
;extension=php_pgsql.dll
;extension=php_pspell.dll
;extension=php_shmop.dll

; The MIBS data available in the PHP distribution must be installed. 
; See http://www.php.net/manual/en/snmp.installation.php 
;extension=php_snmp.dll

;extension=php_soap.dll
;extension=php_sockets.dll
;extension=php_sqlite3.dll
;extension=php_sybase_ct.dll
;extension=php_tidy.dll
;extension=php_xmlrpc.dll
;extension=php_xsl.dll
;extension=php_zip.dll


and a have not loaded php_com_dotnet.dll, php_mbstring.dll etc

On php 5.5 aplpha 4 is ok with the same php.ini

Thanks for reporting this.  We narrowed this down to a build issue with the ZTS build of PHP-5.5.0alpha5.  I have fixed the issue and updated the build and checksum on http://windows.php.net/qa.  Can you please test the new build and let me know if it fixes the issue?

Thanks,
Steve

Thanks - now it works.

Please try using this snapshot:

  http://snaps.php.net/php-trunk-latest.tar.gz
 
For Windows:

  http://windows.php.net/snapshots/

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