I encountered your story on Flickr today. The thing is I had completely forgotten I had installed Tumbarumba. I thought my account had been hacked and asked for help in the forum.
http://www.flickr.com/help/forum/en-us/89840/

When I downloaded the add-on I thought it might be a strange experience, it certainly was.

I cannot say much about your story, cause I was a bit worried and didn't stay long. I hope I find it again.