fixed #228

src/eu/siacs/conversations/services/XmppConnectionService.java

@@ -1482,4 +1482,15 @@ public class XmppConnectionService extends Service {
 			account.getXmppConnection().sendMessagePacket(error);
 		}
 	}
+	
+	public void syncRosterToDisk(final Account account) {
+		new Thread(new Runnable() {
+			
+			@Override
+			public void run() {
+				databaseBackend.writeRoster(account.getRoster());
+			}
+		}).start();
+		
+	}
 }

src/eu/siacs/conversations/utils/UIHelper.java

@@ -482,7 +482,7 @@ public class UIHelper {
 			public void onClick(DialogInterface dialog, int which) {
 				contact.addOtrFingerprint(conversation.getOtrFingerprint());
 				msg.setVisibility(View.GONE);
-				//activity.xmppConnectionService.updateContact(contact);
+				activity.xmppConnectionService.syncRosterToDisk(account);
 			}
 		});
 		builder.setView(view);