Segfault With Memcache

Hi,
Platform
Pressflow 6.22
memcache drupal module 1.9
memcached 1.4.4
pecl memcache 3.0.6
Linux.

I am having a nagging issue with memcache, as i have posted above that is the platform information.
I keep getting segfault different pages i am not too such how many pages i am getting it on but one stands out which the the login page "/user/login", we use panels for the logging module.
when i look at the logs i dont see any php error so i enabled apache coredumps and i traced the segfault, below is the result of the back trace of the coredumps.

(gdb) dump_bt executor_globals.current_execute_data
[0x892ed760] dmemcache_get_multi() ./sites/all/modules/contrib/memcache/dmemcache.inc:139
[0x892eef60] dmemcache_get_multi() ./sites/all/modules/contrib/memcache/memcache.inc:346
[0x892ef170] memcache_wildcards() ./sites/all/modules/contrib/memcache/memcache.inc:298
[0x892efa70] memcache_wildcard_flushes() ./sites/all/modules/contrib/memcache/memcache.inc:192
[0x892efcb0] cache_set() ./includes/theme.inc:247
[0x892f0050] _theme_save_registry() ./includes/theme.inc:238
[0x892f1450] _theme_load_registry() ./includes/theme.inc:191
[0x892f1cd0] _init_theme() ./includes/theme.inc:71
[0x892f3380] init_theme() ./includes/theme.inc:618
[0x892f4700] theme() ./includes/common.inc:2974
[0x892f4a60] drupal_render() ./includes/form.inc:616
[0x892f5680] drupal_render_form() ./includes/form.inc:148
[0x892f67e0] drupal_get_form() ./sites/all/modules/custom/tnt/tnt.module:1241
[0x892f6b40] tnt_action_callback() ./sites/all/modules/custom/tnt/tnt.module:1118
[0x892f6c40] tnt_token_values()
[0x892f72a0] call_user_func_array() ./includes/module.inc:482
[0x892f7d40] module_invoke_all() ./sites/all/modules/contrib/token/token.module:336
[0x892f8060] token_get_values() ./sites/all/modules/contrib/token/token.module:212
[0x892f8450] token_replace() ./sites/all/modules/contrib/token_filter/token_filter.module:64
[0x892f8550] token_filter_replacetoken()
[0x892f8c00] preg_replace_callback() ./sites/all/modules/contrib/token_filter/token_filter.module:34
[0x892f8d00] token_filter_filter()
[0x892f91c0] call_user_func_array() ./includes/module.inc:461
[0x892f9620] module_invoke() ./sites/all/modules/contrib/input_formats/input_formats.module:670
[0x892f9920] input_formats_filter_hook() ./sites/all/modules/contrib/input_formats/input_formats.module:117
[0x892f9a20] input_formats_filter()
[0x892f9ee0] call_user_func_array() ./includes/module.inc:461
[0x892fa710] module_invoke() ./modules/filter/filter.module:455
[0x892fabf0] check_markup() ./modules/node/node.module:1047
[0x892fb020] node_prepare() ./modules/node/node.module:1091
[0x892fb4b0] node_build_content() ./modules/node/node.module:1012
[0x892fb8e0] node_view() ./modules/node/node.module:1107
[0x892fbb40] node_show() ./modules/node/node.module:1803
[0x892fc170] node_page_view() ./sites/all/modules/contrib/ctools/page_manager/plugins/tasks/node_view.inc:105
[0x892fc270] page_manager_node_view()
[0x892fc810] call_user_func_array() ./includes/menu.inc:349
[0x892fcc80] menu_execute_active_handler() ./index.php:17

Please if you need any more info i am happy to provide.