Ok, this is utterly bizarre.
You can find a lot more information here:
Fantasy Flight Games [Warhammer Fantasy Roleplay - Description] - Leading publisher of board, card, and roleplaying games.
Basically, the (eight-sided or six-sided) dice have custom symbols on them. When you attack, you compare the dice symbols to the power card to see the result.
"You hit for normal damage"
"You hit for +2 damage"
"Perform a manouever for free"
"One enemy within close range of you who is not engaged with an opponent may engage you"
Very odd.
Cheers!
Indeed, very odd -- originally I thought they're trying to bring WFRP 3E closer to Warhammer Online, but this reminds me of a boardgame (for example, Hero Quest has similar "custom dice"). Granted, some indie RPGs have all sorts of odd mechanics that utilize dice pools and drawn relationship maps on a grid and whatnot; this, however, feels like a mish-mash of all sorts of weirdness.
I mean, skills on separate *cards* that you attach to your "character keeper!? Two characteristics? A party sheet? Er...
