title: How may I make circular thumbnails using the paperclip gem?
body: <p>The new Basecamp is doing it, as it can be seen in <a href="http://37signals.com/svn/posts/3104-behind-the-scenes-reinventing-our-default-profile-pictures" rel="nofollow">this link</a>. I wonder how can achieve this in my rails 3 application.</p>