Hanging nicknames in the nick list.

I'm hosting ircd Nefarious 1.2.0 and I have noticed that ever since i
logged my psyBNC in there it's been giving me false nicklists everytime i
connect to it.
Example :
I connect to the bnc
It opens the channels
I see in the channel the nicknames :
nick1
nick2
nick3
nick4

But in fact, nick3 disconnected a while ago, but the nickname is hanging,
so i do /names #channel ( on mIRC ) and the nicklist refreshes and i get
the nicknames :
nick1
nick2
nick4

I hope you get the idea.
Anyways i asked the support staff and developers of nefarious ( thinking
that it was a bug in nefarious because i never had that problem back when i
was hosting nefarious 1.0.1 ) and they explained :
Nefarious now has some additional features psyBNC can't handle/doesn't
understand.
I don't know which features those are but it's a major bug.
If you need more info about this or a real example email me at
black_ps@ymail.com

Just so you can see the major difference in the NAMES replies with and
without UHNAMES:

Without UHNAMES:
:Pyro.US.AfterNET.Org 353 Eboj = #afternet :Eboj @SiRVulcaN simplechat
R31D78 @Neisa PyRo ibutsu @PearseToC dcraig2 Kadafi screwball @Therados
+[Sleeping|Beauty] gnominclature +Jamson3 @smoke @liveD Nosferatu
@Jigsy^VNC fc25|dt Locke Kathrin-27^away Penguin penten +Always_Lost
+HellDragon Iderik nesa +PinkFloyd hud Sexxyman @SmallR2002 +^ghost^
TheFerret22 spy macd +Wolvenhaven Gir miscreant
:Pyro.US.AfterNET.Org 353 Eboj = #afternet :@Aku-Away @wizayne NiTeMaRe
@Pcm ph0bic @oracle @aussiegolfer Regicide @Duo_Maxwell @Savoir_Fairy
@spankies @Krobar @Lisalee @dservos @Arden_Laptop @Wulfman Gatewayy
DarthOreo @wendella @JonSnow +Xharky Harvey ComicBot dcraig @Rubin +Jobe
@valtr0n @Hemingray +Neo voice Phil +blaat @LtData +Nader @lucid derefed
@Flash @Beta @X-BNC LogSmurf nerdie-senpai
:Pyro.US.AfterNET.Org 353 Eboj = #afternet :@SenseiKrystal @PeanutHorst
@nolist @dz @X3 @Martin @ThunderWolf reggie zENGx
:Pyro.US.AfterNET.Org 366 Eboj #afternet :End of /NAMES list.

With UHNAMES:
:Pyro.US.AfterNET.Org 353 Eboj = #evilnet
:Eboj!jobe@jobe.Users.AfterNET.Org @SiRVulcaN!BigDaddy@code.monkey
V4mpire!Gary@82.118.111.252 Sergiu!Sergiu@Sergiu.Users.AfterNET.Org
thumb!sa@sinister.nitemare.name +weng!ozz@cpe-76-94-82-83.socal.res.rr.com
Nosferatu!Fire@cpe-74-75-203-56.maine.res.rr.com
+Jigsy^VNC!Jigsy@jigsy.Users.AfterNET.Org
Kathrin-27^away!kati-zh@126-39-239-77-pool.cable.fcom.ch
:Pyro.US.AfterNET.Org 353 Eboj = #evilnet :nesa!nesa@the.end.is.near
^ghost^!kingston@shockcore.Users.AfterNET.Org
HollyW00d!Grant@150.216.124.234
Kotoko!ruri@h93.124.18.98.dynamic.ip.windstream.net
CIA-1!CIA@208.69.182.149 NiTeMaRe!nitemare@quake.nitemare.name
LXIX!bots@Boris.Users.AfterNET.Org
%Gatewayy!gatewayy@gatewayy.Users.AfterNET.Org
raheel!fragment@chiku.silverwraith.com
@Rubin!rubin@rubin.Users.AfterNET.Org
:Pyro.US.AfterNET.Org 353 Eboj = #evilnet
:evul!evul@127.224.101.97.cfl.res.rr.com @Jobe!jobe@Jobe.Users.AfterNET.Org
+voice!voice@randomsonicnet.org
iknietjij!iknietjij@iknietjij.Users.AfterNET.Org
+Nader!supybot@nader.Users.AfterNET.Org
@evilnet!evilnet@X3.AfterNET.Services
@SpamServ!SpamServ@X3.AfterNET.Services @X3!X3@X3.AfterNET.Services
@JC!jc@versalife.mj-xii.com Vadtec!vadtec@you.cant.be.vadtec.net
:Pyro.US.AfterNET.Org 353 Eboj = #evilnet :dcraig!craig@omg.lol
:Pyro.US.AfterNET.Org 366 Eboj #evilnet :End of /NAMES list.

I have the same problem

The problem with all versions of psyBNC is that they have a bug with
uhnames or desyncing ,you see more people on channel unless you do a /hop
#channel to see the real persons,if not you will see the people that have
quit the irc...can you have a look at it.
could be uhnames
if your client sends PROTOCTL UHNAMES
and psyBNC doesnt support UHNAMES
then psyBNC wont understand the names replies
youll get the same problem with UnrealIRCd 3.2.8
(which has introduced UHNAMES too now)