Audacious tends to crash horribly all the time, and it's impossible to run it through GDB because all the debugging symbols have been removed, so when it crashes there's no indication what went wrong. Many other packages seem to be getting a 'debug' USE flag for this reason, is it possible to get one added to media-sound/audacious and media-plugins/audacious-plugins as well? It would make bug hunting so much easier (i.e. not having to manually install from source alongside the ebuild just for debugging.)
A debug use flag reflects debug code paths being used, if they can be triggered via the build script. If you can confirm that this is the case, feel free to reopen. To debug code, you want to FEATURES=+"splitdebug" and CFLAGS=+"-ggdb". Please read the following for more information: http://www.gentoo.org/proj/en/qa/backtraces.xml