Logging of this conversation has failed.

I have a jabber account and server of my own, but use Palringo for an iPhone client. In alot of messages I'll see, "Logging of this conversation failed." come up, yet when I check my jabber server the messages are logged. I also can't find this message on my server side or a reason for it, I noticed my message history in Palringo is empty, so I was wondering if  this was Palringo generating these messages.