On my phone, in the iOS newsblur app, I selected the gear box icon in the lower right. Then I selected the “Find Friends” menu item. In the search box I typed the user name of my friend, a user name I know to be a valid newsblur user name. I select “Search”. The interface spins and spins, and no search results are ever shown.
I went to a browser on a regular computer, went to newsblur.com, and was able to find my friend immediately.