Rewrite configuration in .htaccess breaks other sites in multisite configuration

I have a multisite Drupal configuration, with all sites sharing the same Drupal root. When we activate Gallery on one of those sites, the rewrite rules it adds to the .htaccess in the Drupal root breaks other sites. Here are the rules it is adding:

# BEGIN Url Rewrite section
# (Automatically generated.  Do not edit this section)
<IfModule mod_rewrite.c>
    RewriteEngine On

    RewriteBase /

    RewriteCond %{REQUEST_FILENAME} -f [OR]
    RewriteCond %{REQUEST_FILENAME} -d [OR]
    RewriteCond %{REQUEST_FILENAME} gallery\_remote2\.php
    RewriteCond %{REQUEST_URI} !/index\.php$
    RewriteRule .   -   [L]
#
    RewriteCond %{THE_REQUEST} /d/([0-9]+)-([0-9]+)/([^/?]+)(\?.|\ .)
    RewriteCond %{REQUEST_URI} !/index\.php$
    RewriteRule .   /drupal/sites/site.specific.dir/gallery2/main.php?g2_view=core.Down
loadItem&g2_itemId=%1&g2_serialNumber=%2&g2_fileName=%3   [QSA,L]
    RewriteCond %{THE_REQUEST} /gallery/v/([^?]+)(\?.|\ .)
    RewriteCond %{REQUEST_URI} !/index\.php$
    RewriteRule .   /index.php?q=gallery&g2_path=%1   [QSA,L]
</IfModule>

# END Url Rewrite section

Any suggestions for working around this?