Gnomeregan Quests WOTLK Bug

Both a friend and I experienced this bug in wotlk.

When taking the quest “Chief Engineer Scooty” before taking the quest “Rig Wars” for gnomeregan in orgrimmar, the quest “Rig Wars” becomes no longer available from the NPC who offers it.

A temporary fix is to abandon “Chief Engineer Scooty”, then grab “Rig Wars”, then take the “Chief Engineer Scooty” quest after.