[horde] Blank test.php, login

[Tom Conway]

I've installed horde horde-2.2.6-RC1.
When I run the test.php I get a blank page, no errors
If I login from the horder main page it goes blank.
I'm lost.

using php5, mysql4, apache2, cyrus-imap, postfix

here's the php config from phpinfo

'./configure' '--host=i686-pc-linux-gnu' '--build=i686-pc-linux-gnu'
'--target=i386-tinysofa-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-config-file-path=/etc' '--with-config-file-scan-dir=/etc/php.d'
'--enable-force-cgi-redirect' '--disable-debug' '--enable-pic'
'--disable-rpath' '--enable-inline-optimization' '--with-bz2'
'--with-db4=/usr' '--with-zlib-dir=/usr' '--with-curl'
'--with-exec-dir=/usr/bin' '--with-freetype-dir=/usr'
'--with-png-dir=/usr' '--with-gd=shared' '--enable-gd-native-ttf'
'--without-gdbm' '--with-gettext' '--with-ncurses=shared' '--with-gmp'
'--with-iconv' '--with-jpeg-dir=/usr' '--with-openssl=shared' '--with-png'
'--with-pspell' '--with-xml' '--with-expat-dir=/usr'
'--with-dom=shared,/usr' '--with-dom-xslt=/usr' '--with-dom-exslt=/usr'
'--with-xmlrpc=shared' '--with-pcre-regex=/usr' '--with-zlib'
'--with-layout=GNU' '--enable-bcmath' '--enable-exif' '--enable-ftp'
'--enable-magic-quotes' '--enable-safe-mode' '--enable-sockets'
'--enable-sysvsem' '--enable-sysvshm' '--enable-track-vars'
'--enable-trans-sid' '--enable-yp' '--enable-wddx'
'--with-pear=/usr/share/pear' '--with-imap=shared' '--with-imap-ssl'
'--with-kerberos' '--with-ldap=shared' '--with-mysql=shared,/usr'
'--with-mssql=shared,/usr' '--with-pgsql=shared' '--with-snmp=shared,/usr'
'--with-snmp=shared' '--enable-ucd-snmp-hack'
'--with-unixODBC=shared,/usr' '--with-sqlite=shared,/usr'
'--enable-sqlite-utf8' '--enable-memory-limit' '--enable-shmop'
'--enable-calendar' '--enable-dbx' '--enable-dio' '--enable-mcal'
'--enable-mbstring=shared' '--with-apxs2=/usr/sbin/apxs'

-Later