I started a new match with a friend.The HUD was all gone. Tried shutting down and starting up again. No difference.
I played with me friend guiding me by telling me who was enemy mech etc. And somehow using R for my streaks worked, since I was able to hit them once I just waited few secs for them to lock. So everything else was working. Just that the HUD was all gone. Next match it was all ok again. Didn't had to restart the client.
Also this happens from time to time when shutting down due to heat. But it usally fixes the bug by shutting down and up again manually.
Edited by Niko Snow, 16 April 2013 - 12:33 PM.