Please upgrade to 2.2 here.
The 2.0 and 2.1 branches are no longer being updated.
WhosOnline: Whole Forum in Sidebar (Solved)
This discussion is related to the WhosOnline
When I enable this plugin, I get the entire forum 'duplicated' over in the right hand column where I expect to see the list of Who's Online. It's obviously really ugly, making the plugin sadly unusable.
I tested this in both Chrome and IE8 with the same results.