diff --git a/res/values/strings.xml b/res/values/strings.xml
index 5d5d559ac..f4b7d5fa1 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -79,4 +79,8 @@
     <string name="contact_offline_file">Sending files to an offline contact is unfortunately not supported.</string>
     <string name="send_unencrypted">Send unencrypted</string>
     <string name="decryption_failed">Decrpytion failed. Maybe you don’t have the proper private key.</string>
+    <string name="openkeychain_required">OpenKeychain</string>
+    <string name="openkeychain_required_long">Conversations utilizes a third party called <b>OpenKeychain</b> to encrypt and decrypt messages and to mange your public keys.\n\nOpenKeychain is licensed under GPLv3 and available on F-Droid and Google Play.\n\nTo use openPGP please install the app and then restart Conversations.</string>
+    <string name="restart">Restart</string>
+    <string name="install">Install</string>
 </resources>
diff --git a/src/eu/siacs/conversations/ui/ConversationFragment.java b/src/eu/siacs/conversations/ui/ConversationFragment.java
index e7a5ccf88..c2373cf17 100644
--- a/src/eu/siacs/conversations/ui/ConversationFragment.java
+++ b/src/eu/siacs/conversations/ui/ConversationFragment.java
@@ -271,7 +271,7 @@ public class ConversationFragment extends Fragment {
 				
 				if (item.getType() == Message.TYPE_IMAGE) {
 					String[] fileParams = item.getBody().split(",");
-					if (fileParams.length>=1) {
+					if ((fileParams.length>=1)&&(item.getStatus() != Message.STATUS_PREPARING)) {
 						long size = Long.parseLong(fileParams[0]);
 						filesize = size/1024+" KB \u00B7 ";
 					}
diff --git a/src/eu/siacs/conversations/ui/XmppActivity.java b/src/eu/siacs/conversations/ui/XmppActivity.java
index 4d15addbb..1f9c678a1 100644
--- a/src/eu/siacs/conversations/ui/XmppActivity.java
+++ b/src/eu/siacs/conversations/ui/XmppActivity.java
@@ -10,8 +10,11 @@ import android.app.AlertDialog;
 import android.app.AlertDialog.Builder;
 import android.content.ComponentName;
 import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
 import android.content.ServiceConnection;
+import android.net.Uri;
 import android.os.Bundle;
 import android.os.IBinder;
 import android.view.MenuItem;
@@ -84,9 +87,27 @@ public abstract class XmppActivity extends Activity {
 			return true;
 		} else {
 			Builder builder = new AlertDialog.Builder(this);
-			builder.setTitle("OpenKeychain not found");
+			builder.setTitle(getString(R.string.openkeychain_required));
 			builder.setIconAttribute(android.R.attr.alertDialogIcon);
-			builder.setMessage("Please make sure you have installed OpenKeychain");
+			builder.setMessage(getText(R.string.openkeychain_required_long));
+			builder.setNegativeButton(getString(R.string.cancel), null);
+			builder.setNeutralButton(getString(R.string.restart), new OnClickListener() {
+				
+				@Override
+				public void onClick(DialogInterface dialog, int which) {
+					// TODO Auto-generated method stub
+					
+				}
+			});
+			builder.setPositiveButton(getString(R.string.install), new OnClickListener() {
+				
+				@Override
+				public void onClick(DialogInterface dialog, int which) {
+					Uri uri = Uri.parse("market://details?id=org.sufficientlysecure.keychain");
+					Intent intent = new Intent(Intent.ACTION_VIEW, uri);
+					startActivity(intent);
+				}
+			});
 			builder.create().show();
 			return false;
 		}