autoWebView not working with 1.3.0-beta1

Here is my real device setup that worked with the appium version 1.2.4 (Ruby 2.1.1):

              'platformName' => 'iOS',
              'platformVersion' => '7.1',
              'udid' => '<device udid>',
              'deviceName' => 'Nathan-iPad3',
              'app' => '../appium/build/SafariLauncher/',
              'autoAcceptAlerts' => 'true',
              'autoWebView' => 'true'
      server_url = 'http://localhost:4723/wd/hub/'
      client =
      client.timeout = 300
      @driver = Selenium::WebDriver.for(:remote, :http_client => client, :desired_capabilities => capabilities, :url => server_url)
      @browser =```

Now I get this error whenever the first step attempts to run (using the new master source 1.3.0-beta1):

```Not implemented in this context, try switching into or out of a web view (Selenium::WebDriver::Error::UnknownError)```

As a side note, I have also started to see this error in the appium logs, but it doesn't stop the progress completely:

```info: [debug] [INST STDERR] 2014-10-15 17:27:41.109 instruments[69831:1307] WebKit Threading Violation - initial use of WebKit from a secondary thread.```