I'm using joomla-smf_whos_online_1_4 on J1.0.10
these are the latest versions right? Maybe the error occurs again because of the joomla upgrade (which should fix bugs

, ok in this case security issue...)
I replicated this, not really sure why it is happening but I will look into it.
Me too, i tried it as fast as i could but nothing happened(if it happens only if someone can do it faster I don't care

).