I've upgraded from 4.4 to eZ Publish Community Project 2011.5.
I've a role which has this policy:
content / create / class article / in node 123
So, the user should only create articles at the parent node 123.
(It's not a subtree limitation but a limitation within the policy)
This role / policy worked fine till ez 4.4. But after the upgrade, the user only sees a disabled "create here" button. He can't create the object anymore.