RewriteRule fails when index.php is in sub-directory

[eluser]tarsusc81[/eluser]
Just realized that I neglected the RewriteCond that excludes /codeigniter/index.php from the rule:

Code:

RewriteCond $1 !^(codeigniter/index\.php)

(Note I don't need any of the other exceptions like 'css', 'js', etc., because the rule will only operate on requests matching "^codeigniter" anyway.)

I thought for sure this would fix it. No dice. I still get an internal server error, and now I have to remove "/$1" from the rewrite rule and "codeigniter" from the RewriteCond for the error to go away. I'm stumped.