I remember about a month ago I was speaking to a friend and I said a Present Perfect sentence like "I have [VERB]". I forget the verb but I remember it was an everyday verb, not something exotic. But to my shock and horror, I have used not the participle form of the verb, but the past one, and it sounded more correct than using the past participle. (This was a verb whose participle form was different than its past form.)
Could this be? Can you think of any verb for which this may be true?