scrugug.ogg?

[sgqwonkian]

So, I've got my WW running in Verbose mode now, and one thing I keep seeing is this error:

ERROR: audio_loadasset can't find misc/intro_scrugug.ogg

Doesn't matter what mod I'm running, I get the above all the time. I've done some thorough searching, and there's no intro_scrugug.ogg in my copy of the software, nor any mod.

However, there is a reference to it in the main game. The soundfx.ini file has this line down near the bottom:

intro_2 misc/intro_scrugug.ogg

Any clue why that's there?
Any chance that it's causing some of the instabilities we've experienced?
Do other people have the intro_scrugug.ogg file in their versions of the game?