i stripped out the leading ip address and domain from part of the loop in rewrite log
this is what is looping in the log when the image search causes the "Request exceeded the limit of 10 internal redirects"
(3) [perdir /var/www/wordpress/] add path info postfix: /var/www/wordpress/2011 -> /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] strip per-dir prefix: /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/ -> 2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] applying pattern '^(.*)$' to uri '2011/05/my-soundcloud/akai-lpk25-lpd8/'
(3) [perdir /var/www/wordpress/] add path info postfix: /var/www/wordpress/2011 -> /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] strip per-dir prefix: /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/ -> 2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] applying pattern '.' to uri '2011/05/my-soundcloud/akai-lpk25-lpd8/'
(3) [perdir /var/www/wordpress/] add path info postfix: /var/www/wordpress/2011 -> /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] strip per-dir prefix: /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/ -> 2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] applying pattern '.' to uri '2011/05/my-soundcloud/akai-lpk25-lpd8/'
(3) [perdir /var/www/wordpress/] add path info postfix: /var/www/wordpress/2011 -> /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] strip per-dir prefix: /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/ -> 2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] applying pattern '.' to uri '2011/05/my-soundcloud/akai-lpk25-lpd8/'
(3) [perdir /var/www/wordpress/] add path info postfix: /var/www/wordpress/2011 -> /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] strip per-dir prefix: /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/ -> 2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] applying pattern '.' to uri '2011/05/my-soundcloud/akai-lpk25-lpd8/'
(3) [perdir /var/www/wordpress/] add path info postfix: /var/www/wordpress/2011 -> /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] strip per-dir prefix: /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/ -> 2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] applying pattern '.' to uri '2011/05/my-soundcloud/akai-lpk25-lpd8/'
(3) [perdir /var/www/wordpress/] add path info postfix: /var/www/wordpress/2011 -> /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] strip per-dir prefix: /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/ -> 2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] applying pattern '.' to uri '2011/05/my-soundcloud/akai-lpk25-lpd8/'
(3) [perdir /var/www/wordpress/] add path info postfix: /var/www/wordpress/2011 -> /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] strip per-dir prefix: /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/ -> 2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] applying pattern '.' to uri '2011/05/my-soundcloud/akai-lpk25-lpd8/'
(3) [perdir /var/www/wordpress/] add path info postfix: /var/www/wordpress/2011 -> /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] strip per-dir prefix: /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/ -> 2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] applying pattern '.' to uri '2011/05/my-soundcloud/akai-lpk25-lpd8/'
(3) [perdir /var/www/wordpress/] add path info postfix: /var/www/wordpress/2011 -> /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] strip per-dir prefix: /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/ -> 2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] applying pattern '.' to uri '2011/05/my-soundcloud/akai-lpk25-lpd8/'
(3) [perdir /var/www/wordpress/] add path info postfix: /var/www/wordpress/2011 -> /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] strip per-dir prefix: /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/ -> 2011/05/my-soundcloud/akai-lpk25-lpd8/
(3) [perdir /var/www/wordpress/] applying pattern '.' to uri '2011/05/my-soundcloud/akai-lpk25-lpd8/'
(3) [perdir /var/www/wordpress/] add path info postfix: /var/www/wordpress/2011 -> /var/www/wordpress/2011/05/my-soundcloud/akai-lpk25-lpd8/
there's tons more you can see the original in the rewrite log but you can see it's constantly looping applying this "." pattern