Hi, I've attached a unit test which blows up peak/rules/indexing.py._get_mro. Regards, Alberto -------------- next part -------------- A non-text attachment was scrubbed... Name: test_subclass.py Type: text/x-python Size: 974 bytes Desc: not available Url : http://www.eby-sarna.com/pipermail/peak/attachments/20080715/438706af/test_subclass.py