Membership+ object caching support issues

I'm seeing various fatal errors with Membership memcached object caching after upgrading to the 3.* version. Have you guys tested this?

Stack trace:

Fatal error: Uncaught exception 'Exception' with message 'Serialization of 'Closure' is not allowed' in /Users/davidv/Projects/vagrant-local/www/liberty.me/wp-content/object-cache.php on line 112
( ! ) Exception: Serialization of 'Closure' is not allowed in /Users/davidv/Projects/vagrant-local/www/liberty.me/wp-content/object-cache.php on line 112
Call Stack
# Time Memory Function Location
1 0.0004 252840 {main}( ) ../index.php:0
2 0.0005 255696 require( '/Users/davidv/Projects/vagrant-local/www/liberty.me/wp-blog-header.php' ) ../index.php:17
3 0.0007 269960 require_once( '/Users/davidv/Projects/vagrant-local/www/liberty.me/wp-load.php' ) ../wp-blog-header.php:12
4 0.0009 282936 require_once( '/Users/davidv/Projects/vagrant-local/www/liberty.me/wp-config.php' ) ../wp-load.php:29
5 0.0025 370752 require_once( '/Users/davidv/Projects/vagrant-local/www/liberty.me/wp-settings.php' ) ../wp-config.php:71
6 8.6719 83897520 do_action( ) ../wp-settings.php:352
7 17.5733 93117976 call_user_func_array ( ) ../plugin.php:470
8 17.5733 93118040 Membership_Module_Protection->init_current_member( ) ../plugin.php:470
9 17.5733 93118552 Membership_Plugin::current_member( ) ../Protection.php:63
10 17.5735 93118600 Membership_Factory->get_member( ) ../Plugin.php:245
11 17.6069 92965224 Membership_Factory->_put_into_cache( ) ../Factory.php:103
12 17.6069 92965224 wp_cache_add( ) ../Factory.php:73
13 17.6069 92965320 WP_Object_Cache->add( ) ../object-cache.php:13
14 17.6069 92965600 add ( ) ../object-cache.php:112