Hi,
same problem here.
./configure --prefix=/<prefix>/ --enable-fpm --enable-bcmath --with-bz2
--enable-calendar --with-curl --enable-dba --enable-exif --enable-ftp
--enable-gd-native-ttf --with-jpeg-dir --with-png-dir --with-t1lib
--with-freetype-dir --with-gettext --enable-mbstring --with-mcrypt
--with-mhash --with-mysql=mysqlnd --with-mysqli=mysqlnd
--with-pdo-mysql=mysqlnd --enable-mysqlnd --with-openssl
--with-pcre-regex --with-pspell --enable-shmop --enable-soap
--enable-sockets --enable-sysvmsg --enable-wddx --with-xsl --enable-zip
--with-zlib --with-tcadb --with-openssl-dir --with-gd
###
bin/php -v
PHP 5.4.5 (cli) (built: Aug 8 2012 01:03:00)
Copyright (c) 1997-2012 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2012 Zend Technologies
###
root@Ubuntu-1204-precise-64-minimal ~ # strace -fveall -p 2590 -p 2589
Process 2590 attached - interrupt to quit
Process 2589 attached - interrupt to quit
[pid 2589] wait4(-1, <unfinished ...>
[pid 2590] futex(0x7fc2a4d73720, FUTEX_WAIT_PRIVATE, 2, NULL
###
BR
Aleks