AP fails WDS discovery with 12.3-4JA

Setup:

192.168.1.0 192.168.2.0 | | AIR-1120 AIR350 with IP of WDS configured as WDS | Funk Odyssee Radius Server

When upgrading any one or both sides to 12.3-4.JA the AIR350 fails to register with the WDS. No difference if swapping a 1100 or 1200 series AP as WDS. Same config worked troublefree since 12.2-15.XR2 or 12.3-2.JA2, I can see the udp/2887 traffic passing.

When I tried to download the release notes for 12.3-4.JA for further enlightning, I only got the PDF of 12.2-13.JA :-(

Anyone else similar problems?