I installed the latest iOS4 SDK which replaced my existing SDKs (so I no longer have anything other than 3.2, 4.0).
I also checked out the latest Three20 from github, and now whenever I'm about to Build a new Three20 app, or even run the samples I get the following error:
Build Three20Core of project Three20Core with configuration Debug
Check dependencies
[BEROR]error: There is no SDK with the name or path 'iphonesimulator3.0'
Is Three20 not yet iOS4 SDK compatible?