problems with cache router apc and pathauto

Issue Summary

I installed patch cache with enabled cacherouter using apc on www.daimonin.org

This is my apc setup:

$conf['cacherouter'] = array(
'default' => array(
'engine' => 'apc',
'server' => array(),
'shared' => TRUE,
'prefix' => '',
'path' => 'sites/default/files/filecache',
'static' => FALSE,
'fast_cache' => TRUE,
),

'cache_pathdst' => array(
'engine' => 'apc',
'server' => array(),
'shared' => TRUE,
'prefix' => '',
'path' => 'sites/default/files/filecache',
'static' => FALSE,
'fast_cache' => TRUE,
),
'cache_pathsrc' => array(
'engine' => 'apc',
'server' => array(),
'shared' => TRUE,
'prefix' => '',
'path' => 'sites/default/files/filecache',
'static' => FALSE,
'fast_cache' => TRUE,
),

'cache_views' => array(
'engine' => 'apc',
'server' => array(),
'shared' => TRUE,
'prefix' => '',
'path' => 'sites/default/files/filecache',
'static' => FALSE,
'fast_cache' => TRUE,
),
'cache_block' => array(
'engine' => 'apc',
'server' => array(),
'shared' => TRUE,
'prefix' => '',
'path' => 'sites/default/files/filecache',
'static' => FALSE,
'fast_cache' => TRUE,
),
'cache_form' => array(
'engine' => 'apc',
'server' => array(),
'shared' => TRUE,
'prefix' => '',
'path' => 'sites/default/files/filecache',
'static' => FALSE,
'fast_cache' => TRUE,
),
'cache_page' => array(
'engine' => 'apc',
'server' => array(),
'shared' => TRUE,
'prefix' => '',
'path' => 'sites/default/files/filecache',
'static' => FALSE,
'fast_cache' => TRUE,
),
'cache_filter' => array(
'engine' => 'apc',
'server' => array(),
'shared' => TRUE,
'prefix' => '',
'path' => 'sites/default/files/filecache',
'static' => FALSE,
'fast_cache' => TRUE,
),
'cache_menu' => array(
'engine' => 'apc',
'server' => array(),
'shared' => TRUE,
'prefix' => '',
'path' => 'sites/default/files/filecache',
'static' => FALSE,
'fast_cache' => TRUE,
),
);

i use some path definitions, for example for the users (atm 8300+).

Shortly after patch/enable path cache, the site shows a page not found for some random pages,
mostly for the user. It seems path cache don't returns the right pathauto entries.