When I watch an ogg <video>, I get these messages on stdout: Audio device sucessfully opened [audio] audio resources cleanup completed Not sure if this is a problem or not, but I haven't seen any other printfs in OPT builds...

This seems to be the "offending" file: http://mxr.mozilla.org/mozilla-central/source/media/libsydneyaudio/src/sydney_audio_waveapi.c It seems that there are multiple printfs there that don't check if VERBOSE_OUTPUT is defined, is this intentional?

Yeah, it shouldn't do that. The code is a bit sloppy. I'm making some changes to improve it over in bug 484814, so I'll make this one depend on that and remove the printfs as part of that patch.

Will fix it in bug 495794 instead.

Pushed http://hg.mozilla.org/mozilla-central/rev/e037975c9472