NON-Unicode SRM 5.00 (SRM_SERVER 550)&Unicode SAP R/3 Enterprise (470/620)

Does SAP have any information concerning problems between Unicode SAP R/3 Enterprise, (SAP_APPL 470 & SAP_BASIS 620), and NON-Unicode SRM 5.00 (SRM_SERVER 550)? Are there any companies that have Unicode SAP R/3 Enterprise, (SAP_APPL 470 & SAP_BASIS 620), and NON-Unicode SRM 5.00 (SRM_SERVER 550)? Does SAP have a date of when SRM 5.00 (SRM_SERVER 550) has to be Unicode compliant?