1. Create an Organization: "First Org".
2. Check in the Create Site checkbox in Organization Site. Set the Public Pages to Community Site.
3. Go to Control Panel -> Sites -> First Org -> Actions -> Manage Memberships -> Users -> Assign Users -> add your user.
4. Go to the Liferay site, and add a Directory and a My Sites portlet. (on trunk: Portal Directory and My Sites portlets)
5. In (Portal) Directory choose Organizations. Fill the Search box: "Firs*", and Search. You get the First Org.
6. In My Sites portlet fill the Search box: "Firs*", and Search. You get nothing. But if you fill the Search box: "Firs%", and Search, you get the First Org.
So in (Portal) Directory you should you "*" but in My Sites you should use "%".