squid restarts with ntlm connection (connection_auth on) over cache peers

["Rietzler, Markus \(RZF, SG 324 / <RIETZLER_SOFTWARE>\)" <markus.rietzler@xxxxxxxxx>]

i get the following error in cache_log when trying to access a resource with ntml-auth required.

2012/10/26 15:11:14.847 kid1| entering ConnStateData::clientPinnedConnectionClosed(FD -1, data=0xa9e9e8)
2012/10/26 15:11:14.847 kid1| AsyncCall.cc(34) make: make call ConnStateData::clientPinnedConnectionClosed [call147]
2012/10/26 15:11:14.847 kid1| ConnStateData status in: [ job2]
2012/10/26 15:11:14.847 kid1| assertion failed: comm.cc:1259: "isOpen(fd)"


after that squid restarts.

what can cause this problem?

we are using squid3.2.3 
could it be something with bug 3655 but this should be fixed in squid 3.2.3.

mfg

Markus Rietzler
<rietzler_software/>
Rechenzentrum der Finanzverwaltung

Tel: 0211/4572-2130