title: Macports and Rubygems issues on Snow Leopard
body: <p>I've installed Snow Leopard over Leopard with macports and rubygems already installed. This was regular install, not a clean "archive and erase" install.</p>
  
  <p>It turned out, that SL has 64bit versions of shared libraries and many development utilities do not work. For example, "port" command complains on incompatible tcl library, or ruby cannot load 32bit bundles.</p>
  
  <p>What is the easiest way to solve these issues?</p>