title: Android sdk download/update failing
body: <p>I'm trying to update and install the latest Android SDK (API 8) and keep getting the following error:</p>
  
  <p>Failed to fetch URL <a href="https://dl-ssl.google.com/android/repository/repository.xml" rel="noreferrer">https://dl-ssl.google.com/android/repository/repository.xml</a>, reason: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target</p>
  
  <p>I'm running on OS X 10.6.3  If I visit the url in a browser I'm not getting any errors about an untrusted cert.  </p>
  
  <p>edit:  I'm running Revision 5 of the Android SDK  and AVD manager (if that makes a difference)
  edit:  Tried downloading the latest android sdk (revision 6) and running everything from the command line and still no dice.  I can only assume there's something either in my java installation or in os x on my machine.</p>