NullPointerException: any ideas?

Hello all.

I have deployed a web appliction using the latest smack api 3.2.1 and we often see the following exception:

java.lang.NullPointerException

at org.xmlpull.mxp1.MXParser.isNameStartChar(MXParser.java:3157)

at org.xmlpull.mxp1.MXParser.parseProlog(MXParser.java:1477)

at org.xmlpull.mxp1.MXParser.nextImpl(MXParser.java:1395)

at org.xmlpull.mxp1.MXParser.next(MXParser.java:1093)

at org.jivesoftware.smack.PacketReader.parsePackets(PacketReader.java:325)

at org.jivesoftware.smack.PacketReader.access$000(PacketReader.java:43)

at org.jivesoftware.smack.PacketReader$1.run(PacketReader.java:70)

java.lang.NullPointerException

at org.jivesoftware.smackx.commands.AdHocCommandManager$4.connectionClosedOnError( AdHocCommandManager.java:268)

at org.jivesoftware.smack.PacketReader.notifyConnectionError(PacketReader.java:172 )

at org.jivesoftware.smack.PacketReader.parsePackets(PacketReader.java:332)

at org.jivesoftware.smack.PacketReader.access$000(PacketReader.java:43)

at org.jivesoftware.smack.PacketReader$1.run(PacketReader.java:70)

Any ideas by which thing this could be caused?

Thnx in advance!