Description:
------------
When using cURL to send an HTTP post through a SSL connection that required a 
client certificate it works fine if run straight from the script, outside a 
class. 
However when the same code is executed from within a class for some reason I get 
a private key error that makes no sense since the certificate, private key, 
password and all the cURL options used to connect are executed exactly the same 
way with references to the same files.

Exact version of PHP is 5.2.11
curl->libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5 

compile line
'./configure' '--build=i686-redhat-linux-gnu' '--host=i686-redhat-linux-gnu' '--
target=i386-redhat-linux-gnu' '--program-prefix=' '--prefix=/usr' '--exec-
prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--
datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib' '--
libexecdir=/usr/libexec' '--localstatedir=/var' '--sharedstatedir=/usr/com' '--
mandir=/usr/share/man' '--infodir=/usr/share/info' '--cache-
file=../config.cache' '--with-libdir=lib' '--with-config-file-path=/etc' '--
with-config-file-scan-dir=/etc/php.d' '--disable-debug' '--with-pic' '--disable-
rpath' '--without-pear' '--with-bz2' '--with-curl' '--with-exec-dir=/usr/bin' '-
-with-freetype-dir=/usr' '--with-png-dir=/usr' '--enable-gd-native-ttf' '--
without-gdbm' '--with-gettext' '--with-gmp' '--with-iconv' '--with-jpeg-
dir=/usr' '--with-openssl' '--with-png' '--with-expat-dir=/usr' '--with-pcre-
regex=/usr' '--with-zlib' '--with-layout=GNU' '--enable-exif' '--enable-ftp' '--
enable-magic-quotes' '--enable-sockets' '--enable-sysvsem' '--enable-sysvshm' '-
-enable-sysvmsg' '--enable-track-vars' '--enable-trans-sid' '--enable-yp' '--
enable-wddx' '--with-kerberos' '--enable-ucd-snmp-hack' '--with-
unixODBC=shared,/usr' '--enable-memory-limit' '--enable-shmop' '--enable-
calendar' '--enable-dbx' '--enable-dio' '--without-mime-magic' '--without-
sqlite' '--with-libxml-dir=/usr' '--with-xml' '--with-system-tzdata' '--enable-
force-cgi-redirect' '--enable-pcntl' '--with-imap=shared' '--with-imap-ssl' '--
enable-mbstring=shared' '--enable-mbstr-enc-trans' '--enable-mbregex' '--with-
ncurses=shared' '--with-gd=shared' '--enable-bcmath=shared' '--enable-
dba=shared' '--with-db4=/usr' '--with-xmlrpc=shared' '--with-ldap=shared' '--
with-ldap-sasl' '--with-mysql=shared,/usr' '--with-
mysqli=shared,/usr/bin/mysql_config' '--enable-dom=shared' '--with-dom-
xslt=/usr' '--with-dom-exslt=/usr' '--with-pgsql=shared' '--with-
snmp=shared,/usr' '--enable-soap=shared' '--with-xsl=shared,/usr' '--enable-
xmlreader=shared' '--enable-xmlwriter=shared' '--enable-fastcgi' '--enable-
pdo=shared' '--with-pdo-odbc=shared,unixODBC,/usr' '--with-pdo-
mysql=shared,/usr' '--with-pdo-pgsql=shared,/usr' '--with-pdo-
sqlite=shared,/usr' '--enable-json=shared' '--enable-zip=shared' '--with-
readline' '--enable-dbase=shared' '--with-pspell=shared' '--with-
mcrypt=shared,/usr' '--with-mhash=shared,/usr' '--with-tidy=shared,/usr' '--
with-mssql=shared,/usr' 

Test script:
---------------
i have created two short files that show the difference in usage that is the only difference i can see, available at

http://bizmatebiz.dreamhosters.com/curl_bug_bizmate.zip

Expected result:
----------------
response from the API whose endpoint is specified in the script

Actual result:
--------------
Error: unable to set private key file: '/home/USER/certs/my.pem' type PEM
bool(false)