PHP Fatal error: Call to undefined function ctools_include()

Hi,
Great module, reallly!

When I clear Drupal cache I've started to get the following error, stopping drupal from loading the page. This only happend for anonymous users. I've update Devel today from Devel 6.x - 1.22 to 6.x-1.23. I'd be surprise it's related beacause Devel it's not enabled.

error log:
FastCGI: server "/var/local/fcgi/php-cgi-wrapper.fcgi" stderr: PHP Fatal error: Call to undefined function ctools_include() in /srv/www/drupal/sites/MYSITE.COM/modules/views_content_cache/views_content_cache.module on line 306

Line 306 of Content Cache is: ctools_include('plugins');
I've have the latest ctool loaded 6.x-1.8 without any problem until now

My fast cgi wrapper has nothing special neither, and worked well:
#!/bin/sh
PHPRC="/etc/php5/apache2"
export PHPRC
PHP_FCGI_CHILDREN=8
export PHP_FCGI_CHILDREN
exec /usr/bin/php-cgi

Any direction?
Thank you,

Jean