Android Studio Beta "Cannot resolve character" for all resources

Question

I updated version of Android Studio Beta (0.8.0) from an earlier version 0.6.x. After the upgrade, all projects (which worked previously) cause the error "Cannot resolve symbol" for everything: String, Activity, file, view - that's it. I did clean and restored;

Obviously, I missed something in the update; What could it be?

And my .gradle settings:

buildscript {
    repositories {
       mavenCentral()
}
dependencies {
    classpath 'com.android.tools.build:gradle:0.12.+'
}
}


apply plugin: 'android'

android {
    compileSdkVersion 19
    buildToolsVersion "19.1.0"

defaultConfig {
    applicationId "com.grabdata.gdlea.apps"
    minSdkVersion 9
    targetSdkVersion 19
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        runProguard false
        proguardFiles getDefaultProguardFile('proguard-android.txt'),
       'proguard-rules.pro'
      }
   }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
// You must install or update the Support Repository through the SDK manager to use
  this dependency.
// You must install or update the Support Repository through the SDK manager to use 
  this dependency.
compile 'com.android.support:appcompat-v7:19.+'
 }

Answer 1

Go to the same problem. I cleaned and rebuilt the project, and everything worked again.