So... in this patch we fixed the Doppler Effect (the sensation of something pitching up as it gets closer to you). An unforeseen side effect was that your local sounds were always right in front of you unless you were sliding around, so they got pitched as though they were going to Doppler past you.
I'm sorry this didn't get caught, but we are working on a fix and will try to get it out to you as soon as possible! Sorry for this!