I had a look at the data you sent, and there was a single response from that hop where it responded as 192.168.1.105. That single response was at 9/8/2007, 9:29am. Since this is only one sample out of 50,000 or so, it's likely that some of your other targets didn't have this "spurious" return. Do you have a 192.168.1.105 on your network somewhere?