I'm running 1.5.8 and have a sign up today but I get the message No IP logs were found for the requested user. It's a bit odd because their join date is April 2015, last activity today confirming their account. I guess that's possible if they never confirmed the first time around but doesn't explain the lack of IP address recorded as according to the below the latest visit at least should be. Possibly previous the visit data was lost in an update? I also notice that at some stage they also did a password reset. Any ideas what could be the reason behind the missing IP address?