The Iconfactory today announced the release of IconBuilder Pro 5.1, the latest version of its professional icon creation utility for Mac OS X. IconBuilder 5.1 “provides Macromedia Fireworks MX users the same level of control over the icon creation process that Photoshop users have enjoyed for so many years.” Version 5.1 is a free update for registered users of IconBuilder 5.0. Registered users of IconBuilder Pro 4.x can upgrade to IconBuilder Pro 5.1 for US$20. New users can purchase IconBuilder for $69.