$_SERVER['REQUEST_URI'] has the full URL

Something goofy is going on. REQUEST_URI has the full URL in it instead
of just what is to the right of the domain. PHP_SELF has the right
stuff. For instance:
$REQUEST_URI shows http://www.mydomain.net/some/where
$PHP_SELF shows /some/where

I'm using mod_php 4.3.2:
System Linux fl08lxx22 2.4.21-37.0.1.ELsmp #1 SMP Wed Jan 11 18:44:17
EST 2006 i686
Build Date Nov 7 2005 14:31:46
Configure Command './configure' '--host=i386-redhat-linux'
'--build=i386-redhat-linux' '--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-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-curl' '--with-dom=/usr'
'--with-exec-dir=/usr/bin' '--with-freetype-dir=/usr'
'--with-png-dir=/usr' '--with-gd' '--enable-gd-native-ttf' '--with-ttf'
'--with-gettext' '--with-ncurses' '--with-gmp' '--with-iconv'
'--with-jpeg-dir=/usr' '--with-openssl' '--with-png' '--with-pspell'
'--with-regex=system' '--with-xml' '--with-expat-dir=/usr'
'--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-discard-path' '--enable-track-vars'
'--enable-trans-sid' '--enable-yp' '--enable-wddx' '--enable-mbstring'
'--enable-mbstr-enc-trans' '--enable-mbregex'
'--with-pear=/usr/share/pear' '--with-imap=shared' '--with-imap-ssl'
'--with-kerberos=/usr/kerberos' '--with-ldap=shared'
'--with-mysql=shared,/usr' '--with-pgsql=shared'
'--with-unixODBC=shared' '--enable-memory-limit' '--enable-bcmath'
'--enable-shmop' '--enable-versioning' '--enable-calendar'
'--enable-dbx' '--enable-dio' '--enable-mcal'
'--with-apxs2filter=/usr/sbin/apxs'
Server API Apache 2.0 Filter
Virtual Directory Support disabled
Configuration File (php.ini) Path /etc/php.ini
Scan this dir for additional .ini files /etc/php.d
additional .ini files parsed /etc/php.d/imap.ini, /etc/php.d/ldap.ini,
/etc/php.d/mysql.ini, /etc/php.d/odbc.ini, /etc/php.d/pgsql.ini
PHP API 20020918
PHP Extension 20020429
Zend Extension 20021010
Debug Build no
Thread Safety disabled

If anything, REQUEST_URI is the content written after the GET in the
HTTP Header Request. So your browser might be sending something like
http://myserver.com/where instead of /where because it's not sending
Host: Parameter. Please check.