I have redirects setup for the old pages from our site to now redirect to the Zen Cart pages. It works fine in Firefox, but in IE 7 it crashes. Here is an example:

http://www.silverleaftea.com/000bbb.html

Below is the contents of the .htaccess file:

# $Id: .htaccess 1739 2007-12-20 00:52:16Z hpdl $
#
# This is used with Apache WebServers
#
# For this to work, you must include the parameter 'Options' to
# the AllowOverride configuration
#
# Example:
#
# <Directory "/usr/local/apache/htdocs">
# AllowOverride Options
# </Directory>
#
# 'All' with also work. (This configuration is in the
# apache/conf/httpd.conf file)

# The following makes adjustments to the SSL protocol for Internet
# Explorer browsers

#<IfModule mod_setenvif.c>
# <IfDefine SSL>
# SetEnvIf User-Agent ".*MSIE.*" \
# nokeepalive ssl-unclean-shutdown \
# downgrade-1.0 force-response-1.0
# </IfDefine>
#</IfModule>

# If Search Engine Friendly URLs do not work, try enabling the
# following Apache configuration parameter

# AcceptPathInfo On

# Fix certain PHP values
# (commented out by default to prevent errors occuring on certain
# servers)

# php_value session.use_trans_sid 0
# php_value register_globals 1

php_value session.use_trans_sid off

php_value register_globals off
# <Files ".ht*">
# deny from all
# </Files>

##### NOTE: Replace /shop/ with the relative web path of your catalog in the "Rewrite Base" line below:

Options +FollowSymLinks
RewriteEngine On
RewriteBase /

# From Ultimate SEO URLs
RewriteRule ^(.*)-p-(.*).html$ index\.php?main_page=product_info&products_id=$2&%{QUERY_STRING} [L]
RewriteRule ^(.*)-c-(.*).html$ index\.php?main_page=index&cPath=$2&%{QUERY_STRING} [L]
RewriteRule ^(.*)-m-([0-9]+).html$ index\.php?main_page=index&manufacturers_id=$2&%{QUERY_STRING} [L]
RewriteRule ^(.*)-pi-([0-9]+).html$ index\.php?main_page=popup_image&pID=$2&%{QUERY_STRING} [L]
RewriteRule ^(.*)-pr-([0-9]+).html$ index\.php?main_page=product_reviews&products_id=$2&%{QUERY_STRING} [L]
RewriteRule ^(.*)-pri-([0-9]+).html$ index\.php?main_page=product_reviews_info&products_id=$2&%{QUERY_STRING} [L]

# For Open Operations Info Manager
RewriteRule ^(.*)-i-([0-9]+).html$ index\.php?main_page=info_manager&pages_id=$2&%{QUERY_STRING} [L]

# For dreamscape's News & Articles Manager
RewriteRule ^news/?$ index\.php?main_page=news&%{QUERY_STRING} [L]
RewriteRule ^news/rss.xml$ index\.php?main_page=news_rss&%{QUERY_STRING} [L]
RewriteRule ^news/archive/?$ index\.php?main_page=news_archive&%{QUERY_STRING} [L]
RewriteRule ^news/([0-9]{4})-([0-9]{2})-([0-9]{2}).html$ index\.php?main_page=news&date=$1-$2-$3&%{QUERY_STRING} [L]
RewriteRule ^news/archive/([0-9]{4})-([0-9]{2}).html$ index\.php?main_page=news_archive&date=$1-$2&%{QUERY_STRING} [L]
RewriteRule ^news/(.*)-a-([0-9]+)-comments.html$ index\.php?main_page=news_comments&article_id=$2&%{QUERY_STRING} [L]
RewriteRule ^news/(.*)-a-([0-9]+).html$ index\.php?main_page=news_article&article_id=$2&%{QUERY_STRING} [L]

# All other pages
# Don't rewrite real files or directories
RewriteCond %{REQUEST_FILENAME} !-f [NC]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*).html$ index\.php?main_page=$1&%{QUERY_STRING} [L]

# GZ Zip compression
php_flag zlib.output_compression on
php_value zlib.output_compression_level 5

# Kill etags
FileETag None

RewriteCond %{HTTP_HOST} ^.*$
RewriteRule ^blog/?$ http://www.silverleafteablog.com [R=301,L]

redirect 301 /000bbb.html http://www.silverleaftea.com/blueber...roducts_id=118
redirect 301 /000bbw.html http://www.silverleaftea.com/blueber...roducts_id=118