Was curious, Duergar by the SRD also have a "+1 racial bonus on Listen and Spot checks." in their racial traits.
I'm just wondering if that was taken away from them or missed.
On a side note, when you consider the fact that it says "Duergar Traits (Ex) These traits are in addition to the hill dwarf traits, except where noted." that seems to imply that normally they have ALL the traits dwarves have (except where noted), plus their own which would also include…
•A dwarf’s base land speed is 20 feet. However, dwarves can move at this speed even when wearing medium or heavy armor or when carrying a medium or heavy load.
•Stonecunning: This ability grants a dwarf a +2 racial bonus on Search checks to notice unusual stonework, such as sliding walls, stonework traps, new construction (even when built to match the old), unsafe stone surfaces, shaky stone ceilings, and the like. Something that isn’t stone but that is disguised as stone also counts as unusual stonework. A dwarf who merely comes within 10 feet of unusual stonework can make a Search check as if he were actively searching, and a dwarf can use the Search skill to find stonework traps as a rogue can. A dwarf can also intuit depth, sensing his approximate depth underground as naturally as a human can sense which way is up. Dwarves have a sixth sense about stonework, an innate ability that they get plenty of opportunity to practice and hone in their underground homes.
•Stability: Dwarves are exceptionally stable on their feet. A dwarf has a +4 bonus on ability checks made to resist being bull rushed or tripped when standing on the ground (but not when climbing, flying, riding, or otherwise not standing firmly on the ground).
•+1 racial bonus on attack rolls against orcs (including half-orcs) and goblinoids (including goblins, hobgoblins, and bugbears).
•+4 dodge bonus to Armor Class against creatures of the giant type (such as ogres, trolls, and hill giants).
•+2 racial bonus on Appraise checks that are related to stone or metal items.
•+2 racial bonus on Craft checks that are related to stone or metal.
Albeit, I admit that if 'played straight' with the exception of weapon familiarity, Duergar are basically everything dwarves are + extra. Where they lose out is the -4Cha they normally have (which we lessened to -2) and light sensitivity. Our Duergar do gain the advantage though, of not having Dwarves reduced land speed nor the original Duergar's +1 lvl adjustment.