title: Gradle Sync wont finish after 0.4.6 upgrade
body: <p>After I upgraded my Android Studio to 0.4.6, it seems to get stuck with Gradle Sync. The yellow ribbon is persistently present on the top that says "Gradle Project Synch in Progress". However, there is no indication of any process running from the bar at the bottom.</p>
  
  <p>When I try to run my application, it fails with "Gradle Project Sync Failed. Please fix your project and try again" message that appears in a balloon. However, there are no more information.</p>
  
  <p>I was working on this project successfully before I upgraded to 0.4.6. And since 0.4.6 was updated quickly (within 5 days) from 0.4.5 to fix some gradle related bug, I am starting to wonder if this is something new they introduced.</p>