PTF UK18610 is now available.
PTF UK18610, now available, is referred to in documentation as the Content Manager Version 8.3 Fix Pack 3A.
The PTFs for FP3 (UK17688) and FP3A (UK18610) are both required for Fix Pack 4. Fix Pack 3A must also be SMP/E ACCEPTed prior to Fix Pack 4.
Fix Pack 3A provides toleration for a minor Fix Pack 4 schema change that adds columns to some base library server system tables in support of Records Manager. Fix Pack 3A updates the library server in order to tolerate the new columns in the event that Fix Pack 4 is applied and then removed. This means that you can uninstall Fix Pack 4 back to Fix Pack 3A with minimum disruption.
You cannot to uninstall to a Fix Pack prior to Fixpack 3A.