2.1 regression / wasapi: Qt volume control fails

Start playing a video in VLC. Volume is high, even though volume setting is at 0. Try to set the volume, app crashes. This is the report produced:

Problem signature:

Problem Event Name: APPCRASH

Application Name: vlc.exe

Application Version: 2.1.0.0

Application Timestamp: 4fbb0525

Fault Module Name: libwasapi_plugin.dll

Fault Module Version: 0.0.0.0

Fault Module Timestamp: 4fbb057b

Exception Code: 40000015

Exception Offset: 000000000000146c

OS Version: 6.1.7600.2.0.0.256.48

Locale ID: 1033

Additional Information 1: 3970

Additional Information 2: 3970a56f2033ed5298a79b2b83c72021

Additional Information 3: d896

Additional Information 4: d8961af104581f57f903a28f8bd15807

I haven't downloaded/installed every build, but I know the last working build I have was 20120512. Let me know if I can be of any further assistance.