Search result for People is no result (0) ???

Today I have a problem in Search Service Application for SharePoint 2010 People scope (in spite of this scope is default from SharePoint once we create Search Service Application) is no result (0), but All Files scope is run well.

I try some trick and find the resolution. Here we go ;) :
1. Go to Central Admin, login as System Account
2. Click Manage service applications (Application Management section)
3. Go to search service application
4. Click Content Sources
5. Down arrow > Edit
6. Insert sps3://YourUrl (sps3 is needed to provisioned users that we had from User Profile Services, sometime we need to change this url into --> sps3s://YourUrl especially for protocol handlers)
7. Then OK
8. After that do Full Crawl

Voila, mission complete ^^

http://social.technet.microsoft.com/Forums/en-US/sharepointsearch/thread/2b760f44-3eed-4ab0-96fb-fdccffe0cfdd/

http://social.technet.microsoft.com/Forums/en-US/sharepoint2010setup/thread/d1be9990-84bb-4824-a267-65b8d5f96b97/