I have the same issue
May 10 2016
This occurs for me as well. Can be reproduced in some cases by kiting a zombie inside a smaller building, be removed as a current target to follow and then walking out of the building. The house in question is single-floor house where you have to walk up a staircase and then enter a door on your right-hand side.
I have the same issue. Running version 0.30.113860. I have the latest drivers for my card.
This occurs in the menu when disconnecting from a server.
Got the same issue.