Andrew,
disabling oss in liba52 should have no impact, hopefully, but full reconfiguring for libavc1394 might blow up (

Phyllis, Andrea - can you test this on regular x86, including older/random distro? 

OSS is a choice in Settings->Preferences, Playback A/B for an Audio driver.  Therefore, I do not want to disable this for everyone, as is done in the lines for the thirdparty/Makefile:

-a52dec.cfg_params?=--enable-djbfft
+a52dec.cfg_params?=--enable-djbfft --disable-oss

but the "thirdparty/src/libavc1394-0.5.4.patch1" is good.