More information can be found here:
http://www-01.ibm.com/support/docview.wss?uid=swg21637542
Step-by-Step directions for applying CR2 or CR3 for Connections 4.5 with Connections Content Manager:
http://www-01.ibm.com/support/docview.wss?uid=swg21655425
Updating the IBM Connections 4.5 databases to the required schema versions for Cumulative Refresh 3 (CR3):
http://www-01.ibm.com/support/docview.wss?uid=swg21655480
New functions included in IBM Connections 4.5 CR3:
http://www-01.ibm.com/support/docview.wss?uid=swg21656369
IBM Connections 4.5 CR3 has been published