Deep link shares to Google+, but link does nothing

I'm trying to use deep-linking from Google+ into an Android app, following http://developers.google.com/+/mobile/android/share/deep-link.

I can share to Google+. The link in the post is "clickable" (it highlights during touch), but does nothing on release. Also, the post contains a suspicious "undefined" line of text.

sample http://raw.github.com/concreterose/TestDeepLink/master/README_ASSETS/sample_share.png

I have enabled deep linking in Google Developers Console project credentials.

I'm using a signed-in PlusClient created with Scopes.PLUS_LOGIN, posting via:

Intent shareIntent = new PlusShare.Builder(this, plusClient)
    .setText("Testing deep link")
    .setType("text/plain")
    .setContentDeepLinkId("deeplink",
         "title",
         "description",
         Uri.parse(thumbnailUrl))
    .getIntent();
startActivityForResult(shareIntent, 0);

I'm not sure if I need all of these, while trying to get things working I have:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />

The handling activity (given as the first activity in the manifest):

    <activity android:name=".ParseDeepLinkActivity">
        <intent-filter>
            <action android:name="com.google.android.apps.plus.VIEW_DEEP_LINK" />
            <data android:scheme="vnd.google.deeplink" />
            <category android:name="android.intent.category.DEFAULT" />
            <category android:name="android.intent.category.BROWSABLE" />
        </intent-filter>
    </activity>

is:

public class ParseDeepLinkActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.i(TAG, "onCreate");
        throw new RuntimeException("got here");
    }
}

I'm building with the release keystore and testing on a several real devices running 4.4.

I've tried:

• Using the PlusShare.Builder(activity) constructor (without plusClient), no change.

• Using addCallToAction(label, uri, deeplink) instead of setContentDeepLinkId. There is no call to action button, and clicking the post goes to uri and not the deep link.

• Triple checking "Deep linking: Enabled" is set correctly in the developers console.

• Building without proguard, no change.

• Uninstalling the app then clicking the link (supposed to open the play store entry), does nothing.

• Signing with a different key. Plus sign in fails (as expected).

• Using different versions of play services (4.0.30 vs 3.2.+).

• adb shell setprop log.tag.GooglePlusPlatform VERBOSE does not generate any log messages.

• Fetching my API access token and verifying it has auth/plus.login, it does.

Can anyone tell me what I'm doing wrong? Thanks!!

Update: This is now working, apparently fixed by a Google Play Services update.