Hi, long time lurker here. A very strange problem has occurred on my girlfriends iPhone 4 since updating to the latest Facebook app (5.0). When the app send her notifications there's no sound. There's vibrate, the screen turns on and the message is shown. Obviously, I proceeded troubleshooting. * Checked the silent mode switch. * Checked notification settings in the iPhone settings. * Restarted the app. * Restarted the iPhone. * Performed a hard reset on the iPhone. * Checked for app updates. * Removed the app and downloaded it again. * Checked her Facebook settings. * Checked other applications (like whatsapp) and yes, their notifications have sound. * Messed around with the headphones while in the facebook app, still no sound. * Logged in to my account on her iPhone (same app), and what the hell - there's sound! It works on the same exact environment but with my account! Now I'm suspecting either her Facebook settings (on the webpage) being wrong or the settings saved by the iPhone (under her Facebook user) faulty. * Matched every setting on her Facebook account to my own - and they are setup exactly the same. * Full reset and restore of her iPhone in iTunes. * Removed the app from both the iPhone and iTunes (hoping that would truly clear all Facebook app data) and then re-downloaded the app. * We even (because of some forum post) deactivated her Facebook account and then reactivated it again, thinking it might fix some erroneous setting. None of the above works. The last step is to completely clear her iPhone, but she does not want to loose all contacts and photos and whatnot. Yes, they can be put back, but it seems like a lot of work right now. I'm at a loss. I can't figure out what to do. The notification sound is important to her. Should I post this on some kind of Facebook help page? Thankful for any input in this issue.