Good news for you WhatsApp users on BlackBerry 10. The app has now been updated to version 2.9.3997.0 and along with it comes some nice fixes and improvements.
I for one have been using WhatsApp a ton since we got it on BlackBerry 10. For me it's the perfect way to keep in touch with buddies around the world that for some strange reason still use another OS. I also seem to recall seeing something in our forums regarding Verizon now supporting WhatsApp too. Lots of happy BlackBerry 10 customers!