All of the ad blocking extensions suck. There's no other way to put it. Basically, they all allow the ads to load, and then they remove them after the fact. This allows onload actions in ads to work, which makes the ad blocking far less effective. I've been seeing a lot of ads since switching, despite using the same filter list.
I forgot to mention that as well. I'm pretty bugged about that. What I find even more annoying is that there's an extension for Chrome that does its best to pass its self off as the same as AdBlock for Firefox, when it it clearly is not the same (and not made by the same people).
So far I'm just not ready to move to Chrome. I love the speed improvement, which is noticeable, but it's just not enough.