Newest release 0.58 of Home-assistant is out now. According to the rumors it contains the fix for the IKEA Tradfri gateway. Two weeks ago I suffered from loosing access to it and have not been able to connect to it again. At the moment it is the only thing I’m missing in my home automation setup.
As I’m using the distro of HA called hass.io, it will take a bit longer for the code to be ready for my update.