Stamped, the subject our review last week, is a promising new Google-backed startup that allows users to “stamp” anything - restaurants, books, bars, movies, and so on - with their approval, then share these stamps with friends and followers. Simple and efficient, the service makes it easy for users to gather recommendations by interest or location, cutting out the useless banter and negativity that clogs sites like Yelp.

Still in beta, though, the service has its glitches, including one I found particularly unnerving when I attempted to launch the app last week: no matter which email I used to register, Stamped told me the address was already in use. When I entered my email address to retrieve my password, I was told an error had occurred.

Now that I’ve resolved the issue and become engaged with the app, I’m glad I went through the effort to fix it. To do so, simply try a different username. Apparently, rather than say a username is already in use, users are being told that their email address is already registered; in fact, it’s the other way around. Try a different name for a quick fix, and if you’re in New York, follow New York Magazine - their tips allow you to sidestep the tiresome process of trying to engage with their mobile site.