Jumpy/jerky game?

[StellaInTheSky]

I have an issue similar to what was posted below about the 'stutter stepping' in SVS, but mine is happening the whole game. Its worst when I'm attacking an enemy. I hit them with, for example, a Bane Shot or what have you and they react to the attack but their health takes a second to go down. When I kill an enemy I know for a fact that the health is depleted but the enemy takes a second to actually vanish and drop treasure/money. It actually keeps attacking as well.

This is also a problem in the regular game as I will be running around doing whatever and someone will pass me (not just anyone, but literally all the players I pass) and it looks like they're doing the speed glitch from SVS. It's a very jumpy or jerky motion. This actually started when the most recent 'big update' happened. I've tried switching from OpenGL to DirectX 9, clearing out my cache...I'm kind of lost on what to do now.

I'm refusing to contact the game techs until I have an idea of what to do or at the very least what to ask (no matter what, they always blame it on my internet being wireless, which oddly enough has NEVER been the issue when I've had game problems with this or any other game). Anyone got any ideas of anything else I can try before I have to resort to live chat?

If it helps any, I'm on an Inspiron 1520 running Vista, I've got the latest NVIDIA graphics driver for my PC (which I acutally downloaded right after the big update). I try to keep off laggy servers if I'm doing something I know will lag but even on the quietest of servers this still happens. I'm not really sure what else to do...

Thanks!