.htaccess-RewriteCond：坏标记分隔符。怎么了？

Question

Order allow,deny
Allow from all
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond $1 !^(index\.php|images|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]
AddDefaultCharset UTF-8
php_value short_open_tag 1

有了这个.htaccess，我看到了错误日志：

  

[Thu Apr 21 17：37：33.868932 2016] [core：alert] [pid 6097] [客户   11.33.11.33:30003] /var/www/.htaccess：RewriteCond：坏标记分隔符

有什么问题？谢谢！