Redirect Loop

I have a redirect loop on my archive. My htaccess is:

RewriteEngine On
RewriteBase /forum
RewriteRule ^u([0-9]+)/$ http://www.mustangevolution.com/forum/users/$1/ [L,R=301]
RewriteCond %{HTTP_HOST} !^www\.mustangevolution\.com
RewriteCond %{REQUEST_URI} forum/
RewriteRule (.*) http://www.mustangevolution.com/forum/$1 [L,R=301]

RewriteRule ^((urllist|sitemap_).*\.(xml|txt)(\.gz)?)$ vbseo_sitemap/vbseo_getsitemap.php?sitemap=$1 [L]

RewriteCond %{REQUEST_URI} !(theadmin/|themod/|cron|vbseo_sitemap)
RewriteRule ^((archive/)?(.*\.php(/.*)?))$ vbseo.php [L,QSA]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !^(theadmin|themod|clientscript|cpstyles|images)/
RewriteRule ^(.+)$ vbseo.php [L,QSA]

Using Litespeed webserver.

Try replacing

Code:

RewriteRule ^((archive/)?(.*\.php(/.*)?))$ vbseo.php [L,QSA]

with

Code:

RewriteRule ^((archive/)?(.*\.php(/.*)?)?)$ vbseo.php [L,QSA]

Still doing it.

Nevermind. Seems to be fixed now.