Yes, that's somewhat of a bug I guess. I had to modify the method a while back so the IP checks don't catch that false positive. I'll see what I can do about that in my next release. Thanks for bringing that up.

Did not prevent multiple registrations, and did not report the multiple account log in.

Update...
Im checking again, because it seems to work fine with certain browsers, but not with others (Chrome)

Really? I tested it with Google Chrome before and it worked just fine.

Have you tried testing it on other computers? You may have Chrome/IE cookie settings restricted.

Anyway to get this to work with vbulletin 3.81? Willing to pay $$ :)

i guess i could install it for you, but how much is it worth to simply install it since it works fine on my v3.8.1 system stock? ;)

It works fine on vBulletin 3.8.1. I'll help you install it if you'd like. PM me for further help.

any ideea what this is ... i get them on 2 forums on 3.7.4.

Do you have vB Optimise installed? Because something seems to clash with the two modifications.

i have vb optimise installed...I will disable it and update you on the situation.

Also, if you're feeling daring, you might want to try to use the PM reporting. I heard from someone in this thread that the PM reporting still functioned properly while vB Optimise was enabled.