ClassCastException in SIPClientTransaction

I got this exception from the stack while running load traffic:

[ID 702911 local6.info] Exception in thread "UDPMessageChannelThread"
java.lang.ClassCastException:
gov.nist.javax.sip.stack.SIPClientTransaction
[ID 702911 local6.info] 	at
gov.nist.javax.sip.stack.SIPDialog.setLastResponse(SIPDialog.java:2272)
[ID 702911 local6.info] 	at
gov.nist.javax.sip.stack.SIPClientTransaction.processResponse(SIPClientT
ransaction.java:521)
[ID 702911 local6.info] 	at
gov.nist.javax.sip.stack.SIPClientTransaction.processResponse(SIPClientT
ransaction.java:1254)
[ID 702911 local6.info] 	at
gov.nist.javax.sip.stack.UDPMessageChannel.run(UDPMessageChannel.java:43
5)
[ID 702911 local6.info] 	at java.lang.Thread.run(Thread.java:595)


This is where the exception was thrown. "transaction" was a client
transaction but SIPDialog tried to cast it as a server transaction:

	public void setLastResponse(SIPTransaction transaction,
			SIPResponse sipResponse) {
	...
			} else if (sipStack.isDialogCreated(cseqMethod)
					&& statusCode / 100 == 2) {
				// 2XX response handling.
				if (sipResponse.getTo().getTag() !=
null)
	
setLocalTag(sipResponse.getTo().getTag());

	
this.setState(SIPDialog.CONFIRMED_STATE);
	
this.setDialogId(sipResponse.getDialogId(true));
				sipStack.putDialog(this);

				if (statusCode / 100 == 2 &&
cseqMethod.equals(Request.INVITE)) {
Class cast exception ---->	SIPServerTransaction sipServerTx =
(SIPServerTransaction) transaction;
					this.startTimer(sipServerTx);
				}
			}

I'm running jain-sip-1.2 (Nightly Build 2006-07-23). Any chance this got
fixed in a more recent release?

Thanks,

Ricardo