Arduino on Xcode Project — Official Thread

I just downloaded the latest release, which I'm pretty sure is r45. I created a new project on my local hard drive. When I run Build, it says it's successful, but I get an error that says" Workspace Integrity. Couldn't load project" and the project is not loaded. See screenshots.

Also, can I get previous embedxcode.pkg files on github (https://github.com/rei-vilo/embedXcode)? If so, where?

Screen Shot 2013-04-21 at 7.30.43 PM.png