I'm trying to troubleshoot the following forum thread: http://pkp.sfu.ca/support/forum/viewtopic.php?f=3&t=6958&p=26896#p26896. 

However, when I enable the Custom Block Manager, add two blocks, and click save, I get a blank page with the following errors: 

[Thu Dec 16 13:28:57 2010] [error] [client 127.0.0.1] ocs2 has produced an error\n  Message: WARNING: assert(): Assertion failed\n  In file: /Users/jmacgreg/git/ocs/plugins/generic/customBlockManager/CustomBlockManagerPlugin.inc.php\n  At line: 162\n  Stacktrace: \n  Server info:\n   OS: Darwin\n   PHP Version: 5.3.3\n   Apache Version: Apache/2.2.15 (Unix) mod_ssl/2.2.15 OpenSSL/0.9.8l DAV/2 PHP/5.3.3 mod_fastcgi/2.4.2\n   DB Driver: mysql\n   DB server version: 5.1.38

[Thu Dec 16 13:28:57 2010] [error] [client 127.0.0.1] PHP Fatal error:  Call to a member function getPluginPath() on a non-object in /Users/jmacgreg/git/ocs/plugins/generic/customBlockManager/CustomBlockPlugin.inc.php on line 43

I'm not sure whether this has anything to do with Bug 6076 or not, and I don't believe it has anything to do with John's problem. I have a very recent git checkout, and have also very recently run the upgrade script.