Skype for Windows Phone got updated today, but this appears to be a minor release, with no change log. Skype's last update in mid-January added a "compact view" for messages on high-res displays.
This new update brings the version number up to 18.104.22.168. If you do notice any specific improvements or bug fixes after installing the Skype update, be sure to let us know about them in the comments.
Thanks to sushmanth for the tip!