Warriors Whirlwind Sword

[Tal]

My Undead Warrior just completed the "Cyclonian" Horde Warrior class quest which has three different "Whirlwind" weapons as reward: an Axe, a Hammer and a Sword. He picked the sword, but it looks kinda funny with some half-transparent polygons around the otherwise good looking blade:



As you can see on the above image (here on the character selection screen), the blade doesn't seem to look right with those jaggy polygons around it. I *assume* that this is supposed to be an extra special effect for the blade (an anmimated glow or flame effect or something) that's just not displayed correctly by my graphics card (Geforce 4 Ti 4200 64MB). It might be either the hardware, the Nvidia ForceWare driver (latest version) or DirectX 9 that don't work correctly. Can anyone here confirm if this is actually a display error and what the problem (and solution) is?
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It looks the same as the whirlwind I see on warriors, the tip is supposed to be jagged with etching up and down the length of the blade.