I was running the exact same setup with custom sounds at 60 fps with no issues or crashes before the patch. Also if it was a ping issue it would be a host lost connection message, not a game crash.
i understand that...but the last version did not have the changes to some of the sound system that the new version has...
Added a test sound button to the advanced sound page.
Added a sound slider for game volume when you are transmitting on voice. This slider is in the voice preferences menu labeled as "Record Effects Volume". This can keep your game sounds from bleeding into your voice transmissions and degrading their quality.
Added an optional new voice compressor that can be selected on the host for trials.
Splash screen music can now be replaced by placing a title0.mp3 file in your sounds subfolder.
any one of which could cause an issue with a sound card driver...which in turn could cause the program to crash.
just because it worked yesterday...there is no guarantee that it will work tomorrow...welcome to the world of technology.