I've had a little seepage when the rain comes down especially hard, because the landlord hired idiot contractors who don't understand that you slope the ground AWAY from the house, not TOWARDS it, but that was it until last Tuesday. This is the first time that I've had water come up the basement drain, at all. I'll be getting the landlord to install a backflow preventer and I don't envision having any more issues. Thanks, though.
EDIT - Oh, and I'm working on the grading myself, as the landlord can't be trusted to not hire the lowest common denominator.