Try not to panic until you're sure you need to disclose it. And even then, it isn't so bad. Hell, I was almost expelled from college entirely as a freshman because I got too many drinking tickets. Nobody got hurt or anything like that, I was just an idiotic (and apparently quite loud) 17/18 year old. When I saw that question on grad school applications, I went to the associate dean at my undergrad university and found out that I was never on official probation and therefore didn't need to disclose it at all.
I just read it again, and I am almost certain it doesn't even apply to you. So no need to worry! They'll see the grades on your transcript, probably gloss over them because it was your freshman year, and move on. You're not a criminal.
FuzzyLogician-- I don't think the OP actually committed any sort of offense. Academic probation is, to the best of my knowledge, just a semester of really poor grades. I agree that you need to have it addressed in some way, whether in your personal statement or in a recommendation letter, but I really do not think you need to answer "yes" to that question.