Installing Xcache v1.2.2 causes problems with .htaacess file

[kevcj]

I had my hosting provider install Xcache v1.2.2 this evening. After the install, my sites went down with a 500 internal server error.

renaming the .htaacess files on both forums stopped the error and both forums came back online.

This is a Linux CentOS server
Dedicated Server Dual Core with 4 gigs of memory
Web Server - Apache v2.0.63 (cgi)

htaaccess file from site 1

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

 RewriteEngine on
Options +FollowSymLinks
RewriteCond %{THE_REQUEST} /index\.php\ HTTP/
RewriteRule ^index\.php$ /forum/ [R=301,L]

RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.elgms\.com 
RewriteRule (.*) http://www.elgms.com/forum/$1 [R=301,L]

php_value upload_max_filesize 100M
php_value post_max_size 100M

htaaccess file from site 2

RewriteEngine on
# -FrontPage-

IndexIgnore .htaccess */.??* *~ *# */HEADER* */README* */_vti*

<Limit GET POST>
#The next line modified by DenyIP
order allow,deny
#The next line modified by DenyIP
#deny from all
allow from all
</Limit>
<Limit PUT DELETE>
order deny,allow
deny from all
</Limit>
AuthName www.survivalistboards.com
AuthUserFile /home/survival/public_html/_vti_pvt/service.pwd
AuthGroupFile /home/survival/public_html/_vti_pvt/service.grp
RewriteRule ^((urllist|sitemap).*\.(xml|txt)(\.gz)?)$ vbseo_sitemap/vbseo_getsitemap.php?sitemap=$1 [L]
Options +Indexes
Options +FollowSymlinks
RewriteBase /
RewriteRule ^amazon_store_(.*)_(.*)_(.*).html$ amazon_store.php?page=$3&custom_search=$1&custom_search_index=$2
RewriteRule ^amazon_item_(.*)_(.*)_(.*)_(.*)_(.*).html$ amazon_store_detail.php?&item=$2&page=$1&custom_search=$3&custom_search_index=$4

<Files 403.shtml>
order allow,deny
allow from all
</Files>


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

Options +FollowSymlinks
rewritecond %{http_host} ^survivalistboards.com [nc]
rewriterule ^(.*)$ http://www.survivalistboards.com/$1 [r=301,nc] 

Options +FollowSymLinks
RewriteCond %{THE_REQUEST} /index\.php\ HTTP/
RewriteRule ^index\.php$ / [R=301,L]

php_value upload_max_filesize 50M
php_value post_max_size 50M
php_value include_path my/include/path

Any idea what would cause the htaacess files to cause a 500 internal server error with Xcache v1.2.2 installed?