-protoFix all players and props becoming invisible when viewmodel_fov is set to -360/360 after a short period of time.
Fix tracers not being disabled/game crashing with viewmodel_fov set to 0.
This is probably not a big deal for many, but people who played without tracers and viewmodels for years are getting fucked over right now.
Valve specifically stated in patch notes a couple weeks ago to stop using viewmodel_fov 0 to disable viewmodels. Use r_drawviewmodel instead, and the brand new command r_drawtracers_firstperson 0 to disable self tracers.
See the Feb 11 patch notes for more info.
EDIT: Apparently I can't see when you posted, but considering the thread was started on the 9th, my apologies if you posted before this patch.