you may find some infos in the attachment.
I would suggest to the original bug submitter to disable each php extension and add them one by one and see if the solution proposed for #411982 works for him.
It did for me. CtRiX
Linux server.$domain 2.6.18-5-xen-vserver-amd64 #1 SMP Sat Dec 22 22:58:29 UTC 2007 x86_64 GNU/Linux server:/# ldd /usr/lib/php5/20060613+lfs/gd.so ldd: /usr/lib/php5/20060613+lfs/gd.so: No such file or directory server:/# ldd /usr/lib/php5/20060613/gd.so libgd.so.2 => /usr/lib/libgd.so.2 (0x00002b1d0fe2d000) libt1.so.5 => /usr/lib/libt1.so.5 (0x00002b1d0ff82000) libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x00002b1d100dc000) libX11.so.6 => /usr/lib/libX11.so.6 (0x00002b1d10254000) libXpm.so.4 => /usr/lib/libXpm.so.4 (0x00002b1d1045e000) libpng12.so.0 => /usr/lib/libpng12.so.0 (0x00002b1d1056e000) libz.so.1 => /usr/lib/libz.so.1 (0x00002b1d10691000) libjpeg.so.62 => /usr/lib/libjpeg.so.62 (0x00002b1d107a8000) libc.so.6 => /lib/libc.so.6 (0x00002b1d108ca000) libpthread.so.0 => /lib/libpthread.so.0 (0x00002b1d10b07000) libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0x00002b1d10c1d000) libm.so.6 => /lib/libm.so.6 (0x00002b1d10d51000) libXau.so.6 => /usr/lib/libXau.so.6 (0x00002b1d10ed3000) libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x00002b1d10fd6000) libdl.so.2 => /lib/libdl.so.2 (0x00002b1d110db000) /lib64/ld-linux-x86-64.so.2 (0x0000555555554000) libexpat.so.1 => /usr/lib/libexpat.so.1 (0x00002b1d111de000) server:/# server:/# dpkg -l | grep php5 ii libapache-mod-php5 5.2.0-8+etch11 server-side, HTML-embedded scripting languag ii php5-cgi 5.2.0-8+etch11 server-side, HTML-embedded scripting languag ii php5-cli 5.2.0-8+etch11 command-line interpreter for the php5 script ii php5-common 5.2.0-8+etch11 Common files for packages built from the php ii php5-curl 5.2.0-8+etch11 CURL module for php5 ii php5-gd 5.2.0-8+etch11 GD module for php5 ii php5-mcrypt 5.2.0-8+etch11 MCrypt module for php5 ii php5-memcache 2.0.1-1.1 memcache extension module for PHP5 ii php5-mysql 5.2.0-8+etch11 MySQL module for php5 ii php5-pgsql 5.2.0-8+etch11 PostgreSQL module for php5 ii php5-xmlrpc 5.2.0-8+etch11 XML-RPC module for php5 server:/# server:/# nm -D /usr/lib/libgd.so.2 | grep gdFontCacheShutdown 0000000000019790 T gdFontCacheShutdown server:/# nm -D /usr/lib/php5/20060613/gd.so | grep gdFontCacheShutdown U gdFontCacheShutdown server:/# dpkg -l | grep apache ii apache-common 1.3.34-4.1+etch1 support files for all Apache webservers ii apache2 2.2.3-4+etch4 Next generation, scalable, extendable web se ii apache2-mpm-worker 2.2.3-4+etch4 High speed threaded model for Apache HTTPD 2 ii apache2-utils 2.2.3-4+etch4 utility programs for webservers ii apache2.2-common 2.2.3-4+etch4 Next generation, scalable, extendable web se ii libapache-mod-php5 5.2.0-8+etch11 server-side, HTML-embedded scripting languag ii libapache2-mod-fastcgi 2.4.2-8 Apache 2 FastCGI module for long-running CGI server:/# dpkg -l | grep libgd ii libgd2-xpm 2.0.33-5.2 GD Graphics Library version 2 ii libgdbm3 1.8.3-3 GNU dbm database routines (runtime version)