[xwiki-users] Questions on managing user workspaces.

Hi, I recently installed xwiki workspaces on my ubuntu box and I'm having a few issues. I created two users: user_1 and user_2 whom I would like to be able to view each other's workspaces. For each user, I create a workspace and then click 'Manage Users' to allow others to read/author in my space. On clicking 'Manage Users' I get the following error in console: [ERROR] Left side ($request.action) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. Space_user_1.WebPreferences [line 27, column 22] [ERROR] Left side ($request.action) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. Space_user_1.WebPreferences [line 30, column 23] I then add user_2 to user_1's read list. The results are that user_2 can see updates and even read user_1's pages, but under 'My Dashboard'->'all my spaces' user_2 is not listed as a member of user_1's page. I'd like to know if I'm missing something or if users are allowed to share workspaces like this and how. Also, a bit of a side question, but where can I find out more about using xwiki to setup structured data? Thanks -Nathan