Frequently, when trying to join certain missions, the client will stop responding when the mission loading bar is exactly half way. Repeated attempts to load the same mission on the same server will continue to crash on loading OR occasionally get to the next loading screen, where it will display the NoEntry cfg.bin.skeletons message, and will crash.
This does not always happen on the same servers/missions, but once it starts happening it will not stop.
Verifying game cache after a crash will always result in 1 file being redownloaded but that does not resolve the issue.