diff --git a/xwords4/android/app/build.gradle b/xwords4/android/app/build.gradle
index 0e701a83f..32c3a4842 100644
--- a/xwords4/android/app/build.gradle
+++ b/xwords4/android/app/build.gradle
@@ -1,10 +1,10 @@
 def INITIAL_CLIENT_VERS = 9
-def VERSION_CODE_BASE = 146
-def VERSION_NAME = '4.4.150'
+def VERSION_CODE_BASE = 147
+def VERSION_NAME = '4.4.151'
 def FABRIC_API_KEY = System.getenv("FABRIC_API_KEY")
 def BUILD_INFO_NAME = "build-info.txt"
 
-// AID must start with F (first 4 bits) and be at from 5 to 16 bytes long
+// AID must start with F (first 4 bits) and be from 5 to 16 bytes long
 def NFC_AID_XW4 = "FC8FF510B360"
 def NFC_AID_XW4d = "FDDA0A3EB5E5"
 
diff --git a/xwords4/android/app/src/main/assets/changes.html b/xwords4/android/app/src/main/assets/changes.html
index ab832c830..2d286cf3b 100644
--- a/xwords4/android/app/src/main/assets/changes.html
+++ b/xwords4/android/app/src/main/assets/changes.html
@@ -13,11 +13,11 @@
 	</style>
   </head>
 <body>
-  <h2>CrossWords 4.4.150 release</h2>
+  <h2>CrossWords 4.4.151 release</h2>
 
-  <p>This release speeds move delivery for newly-installed games and
-      hides invite-via-NFC on Android 10 (since it doesn't work
-      there).</p>
+  <p>This release fixes a bad crash, adds a lot of translations in
+      several languages, and lets you invite and exchange moves via
+      NFC on any Android version.</p>
 
   <div id="survey">
 	<p>Please <a href="https://www.surveymonkey.com/s/GX3XLHR">take
@@ -27,11 +27,13 @@
 
   <h3>New with this release</h3>
   <ul>
-      <li>Improve message delivery for new installs</li>
-      <li>Don't offer NFC on Android 10, where it's broken</li>
-      <li>Improve board layout on taller, narrower screens</li>
-      <li>Fix occasional stall sending chat messages</li>
-      <li>Fix another (very rare!) type of stall</li>
+      <li>Fix crash dragging tiles</li>
+      <li>Fix invite-via-NFC for Android 10 (and improve for earlier
+          Android versions)</li>
+      <li>Add ability to send moves via NFC</li>
+      <li>More translations (via Weblate) in Catalan, French, German,
+          Japanese, Norwegian, Polish, and Spanish</li>
+      <li>Fix a couple of other crashes reported via Google (thanks!)</li>
   </ul>
 
   <p>(The full changelog
@@ -39,7 +41,7 @@
 
   <h3>Next up</h3>
   <ul>
-      <li>Fix email invitations</li>
+      <li>Improve move-via-NFC</li>
       <li>Support duplicate-style play (popular in France)</li>
       <li>Improve play-by-data-sms workaround
           using <a href="https://github.com/eehouse/nbsproxy">NBSProxy</a></li>
diff --git a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/BTService.java b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/BTService.java
index 4bc093d54..dbb8cda93 100644
--- a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/BTService.java
+++ b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/BTService.java
@@ -689,7 +689,7 @@ public class BTService extends XWJIService {
                 BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
                 if ( null != adapter ) {
                     for ( BluetoothDevice dev : adapter.getBondedDevices() ) {
-                        Log.d( TAG, "%s => %s", dev.getName(), dev.getAddress() );
+                        // Log.d( TAG, "%s => %s", dev.getName(), dev.getAddress() );
                         if ( btName.equals( dev.getName() ) ) {
                             btAddr = dev.getAddress();
                             s_namesToAddrs.put( btName, btAddr );
diff --git a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/BoardDelegate.java b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/BoardDelegate.java
index 97349641c..994029ab0 100644
--- a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/BoardDelegate.java
+++ b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/BoardDelegate.java
@@ -1102,10 +1102,6 @@ public class BoardDelegate extends DelegateBase
         case LOOKUP_ACTION:
             launchLookup( m_mySIS.words, m_gi.dictLang );
             break;
-        case NFC_TO_SELF:
-            Assert.assertFalse( BuildConfig.DEBUG );
-            // GamesListDelegate.sendNFCToSelf( m_activity, makeNFCMessage() );
-            break;
         case DROP_RELAY_ACTION:
             dropConViaAndRestart(CommsConnType.COMMS_CONN_RELAY);
             break;
diff --git a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/DlgDelegate.java b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/DlgDelegate.java
index 35299e55d..80014cf7f 100644
--- a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/DlgDelegate.java
+++ b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/DlgDelegate.java
@@ -76,7 +76,6 @@ public class DlgDelegate {
         VALUES_ACTION,
         SMS_CONFIG_ACTION,
         BUTTON_BROWSEALL_ACTION,
-        NFC_TO_SELF,
         DROP_RELAY_ACTION,
         DROP_SMS_ACTION,
         INVITE_SMS_DATA,
diff --git a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/GamesListDelegate.java b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/GamesListDelegate.java
index ba91df632..01882a574 100644
--- a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/GamesListDelegate.java
+++ b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/GamesListDelegate.java
@@ -64,7 +64,6 @@ import org.eehouse.android.xw4.loc.LocUtils;
 
 import java.io.Serializable;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Date;
 import java.util.HashSet;
 import java.util.Iterator;
diff --git a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/MultiMsgSink.java b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/MultiMsgSink.java
index 999e03c74..e72d5bafe 100644
--- a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/MultiMsgSink.java
+++ b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/MultiMsgSink.java
@@ -81,7 +81,6 @@ public class MultiMsgSink implements TransportProcs {
 
     int sendViaNFC( byte[] buf, int gameID )
     {
-        Log.d( TAG, "sendViaNFC(gameID=%d, len=%d)", gameID, buf.length );
         return NFCUtils.addMsgFor( buf, gameID );
     }
 
@@ -113,7 +112,6 @@ public class MultiMsgSink implements TransportProcs {
             nSent = sendViaP2P( buf, gameID, addr );
             break;
         case COMMS_CONN_NFC:
-            Log.d( TAG, "transportSend(): got for NFC" );
             nSent = sendViaNFC( buf, gameID );
             break;
         default:
diff --git a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/NFCCardService.java b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/NFCCardService.java
index f87d624df..e5c8f47b1 100644
--- a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/NFCCardService.java
+++ b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/NFCCardService.java
@@ -241,11 +241,9 @@ public class NFCCardService extends HostApduService {
         if ( null != apdu ) {
             if ( HEX_STR.CMD_MSG_PART.matchesFrom( apdu ) ) {
                 resStr = HEX_STR.STATUS_SUCCESS;
-                int[] msgID = {0};
-                byte[] all = reassemble( this, apdu, msgID, HEX_STR.CMD_MSG_PART );
+                byte[] all = reassemble( this, apdu, HEX_STR.CMD_MSG_PART );
                 if ( null != all ) {
                     addToMsgThread( this, all );
-                    setLatestAck( msgID[0] );
                 }
             } else {
                 Log.d( TAG, "processCommandApdu(): aid case?" );
@@ -379,20 +377,19 @@ public class NFCCardService extends HostApduService {
     private static byte[][] sParts = null;
     private static int sMsgID = 0;
     private synchronized static byte[] reassemble( Context context, byte[] part,
-                                                   int[] msgIDOut, HEX_STR cmd )
+                                                   HEX_STR cmd )
     {
-        return reassemble( context, part, msgIDOut, cmd.length() );
+        return reassemble( context, part, cmd.length() );
     }
 
     private synchronized static byte[] reassemble( Context context, byte[] part,
-                                                   int[] msgIDOut, int offset )
+                                                   int offset )
     {
         part = Arrays.copyOfRange( part, offset, part.length );
-        return reassemble( context, part, msgIDOut );
+        return reassemble( context, part );
     }
 
-    private synchronized static byte[] reassemble( Context context,
-                                                   byte[] part, int[] msgIDOut )
+    private synchronized static byte[] reassemble( Context context, byte[] part )
     {
         byte[] result = null;
         try {
@@ -438,10 +435,10 @@ public class NFCCardService extends HostApduService {
                     sParts = null;
 
                     result = baos.toByteArray();
-                    msgIDOut[0] = sMsgID;
+                    setLatestAck( sMsgID );
                     if ( 0 != sMsgID ) {
                         Log.d( TAG, "reassemble(): done reassembling msgID=%d: %s",
-                               msgIDOut[0], DbgUtils.hexDump(result) );
+                               sMsgID, DbgUtils.hexDump(result) );
                     }
                 }
             }
@@ -495,7 +492,8 @@ public class NFCCardService extends HostApduService {
                     int latestAck = getLatestAck();
                     baos.write( numTo( latestAck ) );
                 }
-                Assert.assertTrue( HEADER_SIZE >= baos.toByteArray().length );
+                Assert.assertTrue( HEADER_SIZE >= baos.toByteArray().length
+                                   || !BuildConfig.DEBUG );
 
                 int thisLen = Math.min( maxLen - HEADER_SIZE, length - offset );
                 if ( 0 < thisLen ) {
@@ -533,8 +531,9 @@ public class NFCCardService extends HostApduService {
         public static Wrapper init( Activity activity, Procs procs, int devID )
         {
             Wrapper instance = null;
-            if ( null != NfcAdapter.getDefaultAdapter( activity ) ) {
-                instance = new Wrapper( activity, procs, devID );
+            NfcAdapter adapter = NfcAdapter.getDefaultAdapter( activity );
+            if ( null != adapter ) {
+                instance = new Wrapper( activity, adapter, procs, devID );
             }
             Log.d( TAG, "Wrapper.init(devID=%d) => %s", devID, instance );
             return instance;
@@ -554,12 +553,13 @@ public class NFCCardService extends HostApduService {
             }
         }
 
-        private Wrapper( Activity activity, Procs procs, int devID )
+        private Wrapper( Activity activity, NfcAdapter adapter, Procs procs,
+                         int devID )
         {
             mActivity = activity;
+            mAdapter = adapter;
             mProcs = procs;
             mMyDevID = devID;
-            mAdapter = NfcAdapter.getDefaultAdapter( activity );
         }
 
         private void setResumed( boolean resumed )
@@ -681,16 +681,18 @@ public class NFCCardService extends HostApduService {
             if ( statusOK ) {
                 int offset = HEX_STR.STATUS_SUCCESS.length();
                 if ( HEX_STR.CMD_MSG_PART.matchesFrom( response, offset ) ) {
-                    int[] msgID = {0};
-                    byte[] all = reassemble( mActivity, response, msgID,
+                    byte[] all = reassemble( mActivity, response,
                                              offset + HEX_STR.CMD_MSG_PART.length() );
+                    Log.d( TAG, "receiveAny(%s) => %b", DbgUtils.hexDump( response ), statusOK );
                     if ( null != all ) {
                         addToMsgThread( mActivity, all );
-                        setLatestAck( msgID[0] );
+
                     }
                 }
             }
-            Log.d( TAG, "receiveAny(%s) => %b", DbgUtils.hexDump( response ), statusOK );
+            if ( !statusOK ) {
+                Log.d( TAG, "receiveAny(%s) => %b", DbgUtils.hexDump( response ), statusOK );
+            }
             return statusOK;
         }
 
@@ -729,16 +731,6 @@ public class NFCCardService extends HostApduService {
                     } catch ( InterruptedException ie ) {
                         Log.d( TAG, "run interrupted" );
                     }
-                    // toggle();
-                    // try {
-                    //     // How long to sleep.
-                    //     int intervalMS = mMinMS + (Math.abs(mRandom.nextInt())
-                    //                                % (mMaxMS - mMinMS));
-                    //     // Log.d( TAG, "sleeping for %d ms", intervalMS );
-                    //     Thread.sleep( intervalMS );
-                    // } catch ( InterruptedException ie ) {
-                    //     Log.d( TAG, "run interrupted" );
-                    // }
                 }
 
                 // Kill read mode on the way out
diff --git a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/NFCUtils.java b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/NFCUtils.java
index 56772b53a..76a7bbd98 100644
--- a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/NFCUtils.java
+++ b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/NFCUtils.java
@@ -89,7 +89,7 @@ public class NFCUtils {
             result = intent.getByteArrayExtra( NFC_TO_SELF_DATA );
         }
 
-        Log.d( TAG, "getFromIntent() => %s", result );
+        // Log.d( TAG, "getFromIntent() => %s", result );
         return result;
     }
 
diff --git a/xwords4/android/jni/xportwrapper.c b/xwords4/android/jni/xportwrapper.c
index f3c8597d3..ca5ed0b65 100644
--- a/xwords4/android/jni/xportwrapper.c
+++ b/xwords4/android/jni/xportwrapper.c
@@ -148,7 +148,6 @@ and_xport_sendNoConn( const XP_U8* buf, XP_U16 len, const XP_UCHAR* msgNo,
 static void
 and_xport_countChanged( void* closure, XP_U16 count )
 {
-    XP_LOGF( "%s(count=%d)", __func__, count );
     AndTransportProcs* aprocs = (AndTransportProcs*)closure;
     if ( NULL != aprocs && NULL != aprocs->jxport ) {
         JNIEnv* env = ENVFORME( aprocs->ti );
diff --git a/xwords4/common/board.c b/xwords4/common/board.c
index 89ba5d3d5..6aab7422c 100644
--- a/xwords4/common/board.c
+++ b/xwords4/common/board.c
@@ -2385,14 +2385,12 @@ coordToCell( const BoardCtxt* board, XP_S16 xx, XP_S16 yy, XP_U16* colP,
     const XP_U16 maxCols = model_numCols( board->model );
     XP_S16 gotCol = -1;
     XP_S16 gotRow = -1;
-    const ScrollData* hsd = &board->sd[SCROLL_H];
-    const ScrollData* vsd = &board->sd[SCROLL_V];
 
     xx -= board->boardBounds.left;
     yy -= board->boardBounds.top;
 
     if ( xx >= 0 && yy >= 0 ) {
-
+        const ScrollData* hsd = &board->sd[SCROLL_H];
         for ( XP_U16 col = hsd->offset; col < maxCols; ++col ) {
             xx -= hsd->dims[col];
             if ( xx <= 0 ) {
@@ -2401,6 +2399,7 @@ coordToCell( const BoardCtxt* board, XP_S16 xx, XP_S16 yy, XP_U16* colP,
             }
         }
 
+        const ScrollData* vsd = &board->sd[SCROLL_V];
         for ( XP_U16 row = vsd->offset; row < maxCols; ++row ) {
             yy -= vsd->dims[row];
             if ( yy <= 0 ) {
