Yeah, this is a new variable in Skill.wz that I'm trying to figure out. There is a variable called "psd" which is only associated with some skills. My first instinct was that this was related to photoshop, but there doesn't seem to be anything else that would point toward this conclusion. The following skills have a psd modifier. I'd love it if one of you could figure out why these skills have this modifier.
The psd variable is a boolean - so it's 1 or 0. All of the following skills have psd listed as "1".
Swordman HP Increase Hero Combat Mastery Paladin Guardian Spirit Paladin Blast Dragon Knight Judgement Dragon Magician MP Increase F/P Archmage Magic Mastery I/L Archmage Magic Mastery I/L Archmage Chain Lightning Priest Holy Attraction Bishop Magic Mastery Bishop Holy Shield Bishop Genesis Ranger Dodge Bowmaster Marksmanship Bowmaster Bow Expert Sniper Dodge Crossbow Master Marksman Boost Crossbow Master Marksmanship Assassin Shadow Resistance Night Lord Triple Throw Night Lord Experienced pyochangsul Bandit Shadow Resistance Shadower Boomerang Step Shadower Greed Dualer (30-54) Shadow Resistance Dual Blader (120+) Final Cut Dual Blader (120+) Chains of Hell Dual Blader (120+) Stack Effect Brawler HP Increase Brawler Critical Punch Buccanneer Demolition Gunslinger Critical Shot Corsair Battleship Cannon Dawn Warrior (I) HP Increase Blaze Wizard (I) MP Increase Wind Archer (III) Bow Expert Night Walker (III) Triple Throw Thunder Breaker (II) HP Increase Aran (III) Combo Critical Aran (IV) High Mastery Evan (IX) Magic Mastery Evan (X) Dark Fog Battlemage (I) Finish Attack Battlemage (II) Staff Mastery Battlemage (III) Battlestar Mastery Battlemage (III) Advanced Blue Aura Battlemage (III) Dark Lightning Battlemage (IV) Energy Charge Battlemage (IV) Advanced Dark Aura Battlemage (IV) Advanced Yellow Aura Battlemage (IV) Dark Genesis Wild Hunter (IV) Wild Instinct Wild Hunter (IV) Crossbow Expert