I am getting a random ABEND on NW65SP8 on PROXY.NLM and SERVER.NLM.

I read out somewhere (missed out the URL, didn't bookmark it), someone resolved the issues by applying TCP681K post patch from NW65SP7 and the issues gone away.

I did the same to 4 of my 8 BM servers and the server did stop ABENDS.

I am aware that TCP681K have some fixes which did not include in NW65SP8.
Do anyone have any idea what's in TCP681K which fixes the BM3.8.5 ABEND issues ?