Error 500 - MOD_rewrite

Loaded Modules:
 core_module (static)
 authn_file_module (static)
 authn_default_module (static)
 authz_host_module (static)
 authz_groupfile_module (static)
 authz_user_module (static)
 authz_default_module (static)
 auth_basic_module (static)
 include_module (static)
 filter_module (static)
 deflate_module (static)
 log_config_module (static)
 logio_module (static)
 env_module (static)
 expires_module (static)
 headers_module (static)
 unique_id_module (static)
 setenvif_module (static)
 version_module (static)
 proxy_module (static)
 proxy_connect_module (static)
 proxy_ftp_module (static)
 proxy_http_module (static)
 proxy_scgi_module (static)
 proxy_ajp_module (static)
 proxy_balancer_module (static)
 ssl_module (static)
 mpm_prefork_module (static)
 http_module (static)
 mime_module (static)
 dav_module (static)
 status_module (static)
 autoindex_module (static)
 asis_module (static)
 suexec_module (static)
 cgi_module (static)
 dav_fs_module (static)
 dav_lock_module (static)
 negotiation_module (static)
 dir_module (static)
 actions_module (static)
 userdir_module (static)
 alias_module (static)
 rewrite_module (static)
 so_module (static)
 php5_module (shared)
Syntax OK

#-----------------------------------------
# Jamroom 4 SEFJAM .htaccess file
# $Id: sefjam_htaccess,v 1.1.1.1 2010/04/18 15:24:50 bigguy Exp $
#-----------------------------------------
Options +FollowSymLinks
Options -MultiViews
RewriteEngine On

<IfModule mod_headers.c>
Header unset ETag
FileETag None
<FilesMatch "\.(ico|jpg|jpeg|png|gif)$">
Header set Expires "Thu, 15 Apr 2015 20:00:00 GMT"
</FilesMatch>
</IfModule>

# This is our fallback page if any friendly URL for a profile should
# fail to be redirected.  Note that this is not needed unless you
# need to send failed URLs to a custom page
# Uncomment this line for Cobalt3, Sage, Flashback skins
#SetEnv JR_FRIENDLY_FAIL lists/browse_artist/search_string=
# Uncomment for Nova skin
#SetEnv JR_FRIENDLY_FAIL lists/artists/search_string=

# Uncomment if you are using the Nova or JamTube skins and settings.cfg.php uses a WWW url
#RewriteCond %{HTTP_HOST} !^www\.
#RewriteRule (.*) http://www.%{HTTP_HOST}/$1 [R=301,L]
#
# Uncomment if you are using the Nova or JamTube skins and settings.cfg.php uses a NON WWW url
#RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
#RewriteRule ^(.*)$ http://%1/$1 [R=301,L]

# If we come in EMPTY, just load the index
RewriteRule ^$ index.php [L]

# PAGES (templates)
# Rewrite Pattern                  Redirect URL                Options - SEFTAG required!
RewriteRule ^pages/([^/]+)         index.php?t=$1              [E=SEFTAG:pages,L]
RewriteRule ^charts/([^/]+)        index.php?t=$1              [E=SEFTAG:charts,L]
RewriteRule ^lists/([^/]+)         index.php?t=$1              [E=SEFTAG:lists,L]
RewriteRule ^articles/([^/]+)      index.php?c=$1              [E=SEFTAG:articles,L]
RewriteRule ^signup/([^/]+)        signup.php                  [E=SEFTAG:signup,L]
RewriteRule ^content/(.+)          index.php?c=$1              [E=SEFTAG:content,L]
RewriteRule ^forum(/)+(.*)$        forum.php?band_id=0         [E=SEFTAG:forum,QSA,L]
RewriteRule ^comments(/)+(.*)$     comment.php                 [E=SEFTAG:comments,QSA,L]
RewriteRule ^community(/)+$        index.php?t=community       [E=SEFTAG:community,QSA,L]
RewriteRule ^search(/)+$           index.php?t=search          [E=SEFTAG:search,QSA,L]

# SefJam support for Link Masker
RewriteRule ^chart=([^/]+)$        sefjam.php?uf_str=$1        [L]
RewriteRule ^list=([^/]+)$         sefjam.php?uf_str=$1        [L]
RewriteRule ^page=([^/]+)$         sefjam.php?uf_str=$1        [L]

# Profiles - specific pages
RewriteCond %{SCRIPT_FILENAME} !-f
RewriteCond %{ENV:REDIRECT_STATUS} ^$
RewriteCond %{SCRIPT_FILENAME} !(([^/]+)\.css)
RewriteCond %{SCRIPT_FILENAME} !(([^/]+)\.xml)
RewriteCond %{REQUEST_URI} !^(.*epk.*)$
RewriteCond %{REQUEST_URI} !^(.*song_player.*)$
RewriteRule ^members/([0-9]+)(/.*)?$ sefjam.php?band_id=$1 [QSA,L]
RewriteRule ^([A-Za-z0-9_.-]+)/guestbook(/)?$ guestbook.php?mode=view_guestbook&template=script_guestbook.tpl&profile=$1 [QSA,L]
RewriteRule ^([A-Za-z0-9_.-]+)/epk(/)?$ epk.php?profile=$1 [QSA,L]
RewriteRule ^([A-Za-z0-9_.-]+)/contact(/)?$ contact.php?template=script_contact.tpl&profile=$1 [QSA,L]
RewriteRule ^([A-Za-z0-9_.-]+)/comments(/)?$ comment.php?mode=view_comments&type=band&template=script_comment.tpl&profile=$1 [QSA,L]
RewriteRule ^([A-Za-z0-9_.-]+)/share(/)?$ share.php?mode=form&template=script_share.tpl&profile=$1 [QSA,L]
RewriteRule ^([A-Za-z0-9_.-]+)/info(/)?$ $1/info.php [QSA,L]
RewriteRule ^([A-Za-z0-9_.-]+)/forum(/.*)?$ forum.php?profile=$1 [QSA,L]

# Profiles - entry
RewriteCond %{SCRIPT_FILENAME} !-f
RewriteCond %{SCRIPT_FILENAME} !-d
RewriteRule ^([^/]+)((/.+\.php)?/?)$ sefjam.php?uf_name=$1&uf_path=$2 [QSA,L]