might theses have been set to this on the import as it was imported by the localhost?

Nothing Gizmo, my fault. I apologize. I took it as a dig at me when obviously it was not.

Sorry guy.

My thoughts are that if it's from an import that the users who didn't have a registration ip stored pre-import that it inserted them as 127.0.0.1

indeed

Why would Admins and Mods be blank ?

When they originally registered they were not Admins or Mods and when they are logged in right now you see their IP so I'm assuming that it's blank for some reason and it was made blank when they became an Admin or Mod, just not sure why that would be.

Trying to understand the application better.

i think that in classic when you registered and it couldn't read your ip (not sure why) it would enter a blank; im' not sure if it'd happen in threads either.

Basically sometimes an ip can't be read, or is read as the webserver; especially when php is running as a cgi.

Yeah, it can't always be determined... just look at your stats - a lot of things are "unknown" :/

a bit like life...

lol yeh, a stats logger is a good way to look at things; mine has a ton that are "unknown" or listed as my server name.