A client got in touch recently with a maddening problem. When he received texts on his iPhone, Messages displayed notifications for messages from everyone…except his wife! Needless to say, this was a problem. Since notifications appeared correctly for other people, it wasn’t related to overall settings. It turned out that he—or someone else, or iOS gremlins—had inadvertently enabled the Hide Alerts switch for the Messages conversation with his wife. To fix it, all he had to do was display the conversation in Messages, tap the (i) button at the upper right, and disable Hide Alerts. (In the Mac version of Messages, click the Details button and look for the Do Not Disturb checkbox.) It’s a good feature designed to let you mute a chatty group conversation, but it can cause stress if applied to the wrong conversation accidentally.