If you've got an unlocked international (non-carrier branded) HTC One S, it's time to start hitting that "Check for updates" button, as a new firmware version is being pushed out over-the-air. The update to v1.78 weighs in at just under 60MB, and remains based on Android 4.0.3. The only obvious change we're noticing so far is the removal of the three-dot menu software menu button in certain Google apps. YouTube, for example, used to show an ICS-style overflow button up to and down below before, and now the unsightly bottom bar has gone. It's also likely this latest OTA includes a fix for the Wifi disconnection bug that's been plaguing some One S owners since day one, though as it's an intermittent issue we haven't been able to confirm this just yet.
It's worth noting that today's update is for unbranded One S models only, so if you bought yours through a carrier, you may have to wait an extra few weeks for a network-approved version to be pushed out. But those running an unlocked, unbranded One S can head head to Settings > About phone > Software updates to grab the latest OTA. When you're done, be sure to keep us posted of any changes or fixes down in the comments.