Spark causing IllegalArgumentException in Openfire

A couple of times today, Spark has caused this Exception in Openfire

2011.07.01 15:08:46 Rejecting packet. JID malformed

java.lang.IllegalArgumentException: Existing at-character at the first character of the string indicates that an empty node part is provided. This is illegal.

at org.xmpp.packet.JID.getParts(

at org.xmpp.packet.Packet.(

at org.xmpp.packet.IQ.(




I have been unable to recreate it, but both times it occurred when I was in the Add Contact dialog. The packet that was sent to the server was this.

My host is atacama