Titanium 1.2.2 and SDK 1.5.1 - iPhone Install Error

I've circled the FAQs for a few days now, attempting to fix this issue from other posters who have had similar problems. None have worked. I've deleted projects, synced phones, reinstalled profiles, completely uninstalled Titanium and reinstalled and more.

My issue remains the same. I can use the iPhone simulator to test my app, but when it comes to installing in iTunes I get the same error every time. This is the same when I start a new project, attempt to install an old one, or install the kitchensink... anything really...

Install Error
 
 Error: Traceback (most recent call last):
  File "/Library/Application Support/Titanium/mobilesdk/osx/1.5.1/iphone/builder.py", line 1143, in main
    execute_xcode("iphoneos%s" % iphone_version,args,False)
  File "/Library/Application Support/Titanium/mobilesdk/osx/1.5.1/iphone/builder.py", line 925, in execute_xcode
    output = run.run(args,False,False,o)
  File "/Library/Application Support/Titanium/mobilesdk/osx/1.5.1/iphone/run.py", line 31, in run
    sys.exit(rc)
SystemExit: 1

It's extremely frustrating that simply updating Titanium can lead to something like this. I know I've lost files in the process of trying to fix this, and would love any help or suggestions. I'd just really like to get back to being able to hit the "Install Now" button without any complications.

Really hope Appcelerator release a more stable build of this software soon. It's hard to convince my work to purchase the Pro plan when this stuff happens.

Any help is greatly appreciated.