I upgraded to the user_tracking_20060805 today and now it seems that the user tracker is missing to record som visitors

I hade a customer who posted in our guestbook today 14:49 and there are no records of that in the user tracker.. Normaly i do see if someone visit and post in our guestbook. The guestbook: http://siamonnet.se/babystore/index....page=guestbook