It's a typo. According to City of Data, all versions of Hide offer the same defense: Versus Smashing, Melee, Ranged and AoE. Why Smashing particularly I don't know, but I'm guessing it's to allow it to stack with Smashing Defense elsewhere in the set.
If this can be shown to be not true in game (say, by using the Combat Attributes) then I stand corrected.
Note, BTW, that it is impossible for any Positional Defense to not offer protection from Psi. The only way to exclude Psi is to give Defense to all other Types, and that would exclude using Positional Defense. This is one of the reasons why Force Field no longer has a "hole" against Psi attacks.
Mmm very odd. I right clicked on Hide and looked at what it was doing. It lists 1.88% (or whatever no.) def to smashing, 1.88 to lethal, 1.88 to..etc etc. The only thing missing was PSI def.
Now I didnt actually check the combat atts, but the power info has no psi def in the list. If you look at the right click inof for power shield, you can see a +psi component, when pvp is toggled. But again..no +psi for hide
I will have to go check it out in the combat atts now.
Well, as I said, if the game disagrees with City of Data, then the game is right. Obviously. 
It makes no sense to me for Hide not to have Positional Defense, though. One of the defining attributes of Hide is that it offers 37.5% Defense against AoE damage while Hidden. This helps prevent your Hide from being broken by AoE attacks when you are moving into range to strike. If EA does not have this capability, that's a severe problem.
If Hide has both Positional AND Typed Defense, then the Positional Defense will take precedence if you are attacked by a Psi attack. If it is a melee attack, then the Melee Defense will take precedence and you will be protected. If it is ranged, then Ranged Defense will take effect. The only way the attack can bypass Hide is if it is one of the rare powers (mainly Controller holds) that are not considered to have a Position.
Still havent checked combat atts..on a silly posi tf.
Thanks for the replies Jade..I agree its very odd.
especially, from a PvE point of view, the huge amount of psi users in missions, many of which are AoEs. And in PvP, all the Psi using hero at's.
Sine EA was just buffed..its really worrying if they left this out on purpose.
All Hides are exactly the same, providing defense to all types but Psionic damage and all positions. The only reason Energy Aura's description is different is because the set was the only typed Defense Stalker set at CoV launch, so listing it that way was more important than listing it as +Def(Melee, Ranged, AoE) like the other sets were. It was overlooked for sets added after that, though, as you can see with the Willpower Hide, which was just copied from the other Hides.
And on City of Data:
When a power is +Defense to all types and positions except Psi, it will list as Defense (Smashing, Melee, Ranged, AoE).
When a power is +Defense to all types and positions, including Psi, it will list as Defense (All types, Melee, Ranged, AoE).
Thanks, Trickshooter. That explains what CoD's entry means.
I checked Hide on an EA, Ninjitsu, and Regeneration Stalker. In all three cases they were exactly the same. Defense was available on all Types except Psi, plus Melee, Ranged and AoE. As I expected, AoE was much higher than any of the other values. (Over 50% on my level 35 Stalker, although I think a good part of that was an AoE defense coming from a guy standing next to me)
So there is a "hole" against Psi attacks that don't count as Melee, Ranged or AoE, but that's the case with all Hide powers. EA doesn't have any special penalty.
In fact, I'm pretty sure Combat Jumping, Weave, and the other similar Pool powers work the same way. The short help probably should say, "Melee, Ranged, AoE, all types but Psi" on all applicable powers, but the number of such powers is probably pretty high.
Ok..this is more a rant than a question..since i assume things are this way cause the devs are, well, you know.
The Hide power on energy aura for stalkers specifically states it does NOT give Psi defence? Does anyone know why this is? And why it would make even the tiniest bit of sense? Every other Hide, from the other sets, has Def to all. Not only that..every stealth power in the game (i think) is all defence to all.
So why is EA singled out as having no psi in hide? I get it has no psi def from the main two toggles, im not arguing about that.
EA's power shield toggle gives psi def in pvp also...so surely we would assume if the devs give psi def for that, just in a pvp zone..why doesnt Hide at least get a +psi def boost in pvp?
If things like SR, elec and dark (both resist sets) get psi def in Hide..why not EA?
Hell I dont even like ea that much!! But why?!