
Basically, any silithid with the "boss model" (see: http://www.wow-petopia.com/family/silithid.html) will constantly make screeching sounds upon walking backwards, strafing from side to side, swimming, and occasionally on some snow surfaces.
Here's some video proof, by yours truly: http://www.youtube.com/watch?v=g5HYCWIWzBc
Can anyone with Beta see if this problem persists? (I submitted a ticket back in February and spoke with a GM briefly, but I've received no information that it will be fixed anytime soon.)
If it isn't already patched, let's get some support to stop this problem! I can't stand to use my favorite pet outside of BGs and arenas just because the slightest wrong turn will emit constant screeching that everyone can hear.