I'm sorry, but...
You guys shouldn't be going out to dinner with a girl when you're still unsure if she really digs you or not. I mean, I don't expect this to be gospel, but why are you taking a girl with, as Doc Love would put it, unknown IL on a dinner date? You should be out having fun, hanging out.
Dinner is a solid investment of time and money spent with someone whom you should ALREADY KNOW is not a golddigger, or "professional dater" or whatnot. And if you already know this then the "Who pays?" question is moot, because you can do whatever your style is.
By the time you're at a dinner date you should already know that you want to spend more time with this chick. So unless she does something during dinner to piss you off, it doesn't even matter because the money thing evens itself out with time spent together in the future.
The bottom line? Be assertive and assume that you're paying from time to time, but don't do it so often that she would expect you to always pay.
If you offend her by offering to pay, because she's a hardcore feminist, it looks like you won't be getting along. (Caveat: unless hardcore feiminism turns you on, in which case you can bust her balls and say she can't take a joke, and continue from there. Make sure to let her on top when you go over to her place.)
cynetix