This particular release saw work done on improving the overall reliability and performance of the application, with plenty of attention paid to background notifications and calling. The People Hub integration has been disabled on a temporary basis as it has been pinpointed as the cause of device stability, and hopefully integration will be made available sometime down the road after more kinks are ironed out.
Other changes include an updated chat keyboard with improved autocomplete/autocorrect, buddies from Windows Live Messenger being labeled in the People list, an additional option to enable toast notifications for Windows Live Messenger buddies, and improved call reliability among others. Are you loving your freshly updated Skype for Windows Phone 8?