Payflow Pro functionality seems to work fine with 
'apachectl start', but when I load mod_ssl with 
'apachectl startssl', i get a seg fault.  I saw a similar
problem mentioned earlier, but it is supposedly fixed
for newer versions (v3) of libpfpro.so. 

Payflow Pro Version: L300 (from phpinfo())
OpenSSL Version: 0.9.6a (built with no-threads -fPIC)
Apache Version: 1.3.20
PHP Version: 4.0.6RC2

PHP Config:
./configure --with-apxs=/usr/local/apache/bin/apxs \                     --with-config-file-path=/etc/httpd \
            --with-mysql=/usr \
            --enable-track-vars \
            --with-zlib \
            --with-pfpro \
            --enable-debug 


[root@sydney apache]# gdb ./bin/httpd -c core 
GNU gdb 5.0
Copyright 2000 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux"...
Core was generated by `./bin/httpd -DSSL -X'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /lib/libm.so.6...done.
Loaded symbols for /lib/libm.so.6
Reading symbols from /lib/libcrypt.so.1...done.
Loaded symbols for /lib/libcrypt.so.1
Reading symbols from /lib/libdl.so.2...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /lib/libc.so.6...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /usr/local/apache/libexec/mod_env.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_env.so
Reading symbols from /usr/local/apache/libexec/mod_log_config.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_log_config.so
Reading symbols from /usr/local/apache/libexec/mod_mime.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_mime.so
Reading symbols from /usr/local/apache/libexec/mod_negotiation.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_negotiation.so
Reading symbols from /usr/local/apache/libexec/mod_status.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_status.so
Reading symbols from /usr/local/apache/libexec/mod_include.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_include.so
Reading symbols from /usr/local/apache/libexec/mod_autoindex.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_autoindex.so
Reading symbols from /usr/local/apache/libexec/mod_dir.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_dir.so
Reading symbols from /usr/local/apache/libexec/mod_cgi.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_cgi.so
Reading symbols from /usr/local/apache/libexec/mod_asis.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_asis.so
Reading symbols from /usr/local/apache/libexec/mod_imap.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_imap.so
Reading symbols from /usr/local/apache/libexec/mod_actions.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_actions.so
Reading symbols from /usr/local/apache/libexec/mod_userdir.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_userdir.so
Reading symbols from /usr/local/apache/libexec/mod_alias.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_alias.so
Reading symbols from /usr/local/apache/libexec/mod_rewrite.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_rewrite.so
Reading symbols from /usr/local/apache/libexec/mod_access.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_access.so
Reading symbols from /usr/local/apache/libexec/mod_auth.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_auth.so
Reading symbols from /usr/local/apache/libexec/mod_setenvif.so...done.
Loaded symbols for /usr/local/apache/libexec/mod_setenvif.so
Reading symbols from /usr/local/apache/libexec/libphp4.so...done.
Loaded symbols for /usr/local/apache/libexec/libphp4.so
Reading symbols from /lib/libpam.so.0...done.
Loaded symbols for /lib/libpam.so.0
Reading symbols from /usr/local/lib/libpfpro.so...done.
Loaded symbols for /usr/local/lib/libpfpro.so
Reading symbols from /usr/lib/mysql/libmysqlclient.so.10...done.
Loaded symbols for /usr/lib/mysql/libmysqlclient.so.10
Reading symbols from /usr/lib/libz.so.1...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/libresolv.so.2...done.
Loaded symbols for /lib/libresolv.so.2
Reading symbols from /lib/libnsl.so.1...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /lib/libpthread.so.0...done.
rw_common (): write: Success.

warning: unable to set global thread event mask
[New Thread 1024 (LWP 16465)]
rw_common (): write: Success.

warning: stop_or_attach_thread: generic error
Loaded symbols for /lib/libpthread.so.0
Reading symbols from /usr/local/apache/libexec/libssl.so...done.
Loaded symbols for /usr/local/apache/libexec/libssl.so
Reading symbols from /lib/libnss_files.so.2...done.
Loaded symbols for /lib/libnss_files.so.2
Reading symbols from /lib/libnss_nisplus.so.2...done.
Loaded symbols for /lib/libnss_nisplus.so.2
Reading symbols from /lib/libnss_nis.so.2...done.
Loaded symbols for /lib/libnss_nis.so.2
Reading symbols from /lib/libnss_dns.so.2...done.
Loaded symbols for /lib/libnss_dns.so.2
#0  0x403f5364 in pfproVersion () from /usr/local/lib/libpfpro.so
(gdb)