This is the entire rule set.
RewriteEngine on
# Set to vbulletin directory
RewriteBase /
#RewriteCond %{REQUEST_FILENAME} -s [OR]
#RewriteCond %{REQUEST_FILENAME} -l [OR]
#RewriteCond %{REQUEST_FILENAME} -d
#RewriteRule ^.*$ - [NC,L]
RewriteRule ^threads/.* showthread.php [L,QSA]
RewriteRule ^forums/.* forumdisplay.php [L,QSA]
RewriteRule ^members/.* member.php [L,QSA]
RewriteRule ^blogs/.* blog.php [L,QSA]
ReWriteRule ^entries/.* entry.php [L,QSA]
RewriteRule ^list/([^/]*/)([0-9]+) list.php?r=$1$2 [L,QSA]
RewriteRule ^content/(.*) content.php?r=$1 [L,QSA]
RewriteRule ^widget/config/([0-9]+) widget.php?r=config/$1 [L,QSA]
RewriteCond %{REQUEST_URI} !(admincp/|dbseocp/|modcp/|cron|mobiquo|forumrunner|api\.php|reviewpost/|classifieds/|photopost/)
RewriteRule ^((archive/)?(.*\.php(/.*)?))$ dbseo.php [L,QSA]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !/(admincp|dbseocp|modcp|clientscript|cpstyles|images|reviewpost|classifieds|photopost)/
RewriteRule ^(.+)$ dbseo.php [L,QSA]
this is the only line that contains '^(.*\\.php(/.*)?))$'
RewriteRule ^((archive/)?(.*\.php(/.*)?))$ dbseo.php [L,QSA]