Who's Online, message

[assad75]

I am facing these kind of messages Nothing, or nothing you can see, after upgrading smf  2.0 RC4 to 2.0 RC5.Iam surprised why its happening.I try my best but i couldn't trace that.I am afraid that i missed huge traffic due to this error.
kindly help.The screen shot is below of Who's Online status.

[Arantor]

Well, nothing or nothing you can see appears for two reasons.

Firstly, if you're not an admin, it can appear to you because they're somewhere you can't see, e.g. if you're a regular user and someone's in the admin panel.

More commonly, though, and this applies to everyone - if they were trying to access a topic that no longer exists, that error will come up, e.g. old topics that were indexed and since deleted. Since the topic was deleted, you can't see it...

[DimTwinkle]

Just upgraded from 1.1.15 to 2.0.1 and all my guests are reported "Nothing, or nothing you can see" when I look, as admin, at Who's Online. I was using Pretty URLs before and decided not to carry that forward so I'm assuming that is why I'm getting that response. With all those "Pretty URLs" gone I'm wondering if Google Webmaster tools will explode. 

I'm not worried much about SER anyway.

[Illori]

in the future please open separate topics for your issue and please dont bump old topics.