Advanced Search by Email unders Users not working

Reproduced in 6.1.x and Trunk rev. 134035

Steps to reproduce:
1) Add several users alpha@test.com, baker@test.com, charlie@test.com
2) Log into liferay.com (as an Administrator)
3) Navigate to Control Panel
4) Under Portal, navigate to Users and Organizations
5) Under Users Without an Organization, Search All Users
6) Select "Advanced" Search

Scenarios tested (under Email Address):
a) @test.com - does not work
b) alpha - does not work
c) alpha@test.com - does work

Prior to upgrade, all scenarios worked.