PeopleTools 8.52 and libpsio_dir.so

I recently upgraded our SA and HRMS's PeopleTools from 8.50.20 to 8.52.10, the upgrade itself was pretty straight forward and went smoothly. However, it broke the LDAP authentication. When you go to "PeopleTools -> Security -> Directory -> Configure Directory", click the "search" button, click the Directory ID, then click the "Test Connectivity" tab, it just hangs there. Under the "Directory Setup" tab, all settings were confirmed correct. After some research, it turns out the problem was PS_HOME/bin/libpsio_dir.so. It appears PeopleTools 8.52 now delivers libpsio_dir.so under PS_HOME/bin/interfacedrivers, if the old  8.50.20 PS_HOME/bin/ libpsio_dir.so still exists, it will get called instead of the new 8.52.10 PS_HOME/bin/interfacedrivers/libpsio_dir.so, thus causing the "hang" issue. So remember to remove the old libpsio_dir.so after the upgrade is done.