Mmmm I think that we disagree about the unsubscribe indicator light. The message says 'Unsubscribe from this topic' and I would expect the green light to be affirmation that you want to Unsubscribe just as a green light is affirmation that you want to subscribe when you are not subscribed to that topic. That would then be consistent.
When I say just does not work I mean that I cannot see any useful function from it at all. Surely it should have a list of subscribed topics then when the list is opened there should be a flag or something similar that indicates whether there are new posts there on each individual subscribed topic.
However if I understand you correctly then it is not working how you describe either.
I log on as MemberA and post something in a topic called 'subscribe test'. Member B, another user, is subscribed to that topic but is currently not logged in. I log in as Member B on another browser and would expect to see at least Subscribed 1 in the header button. I do not, I see a big fat zero. If I click on the subscribed list I get the message
'Invalid database query' then on the next lines
'List of currently subscribed topics'
'You are not currently subscribed to any topics'
I guess the first line is the important one and it was remiss of me not to notice it sooner!
I do not get any errors or warnings in the FF error console when running this.
This occurs with revision 6855 and the default theme.