bd71, on 2010-December-21, 23:14, said:
I double-check about the 2N bid, and am told that over a minor suit bid, they play "Unusual Notrump" as showing the other minor and an unknown major. After we object that that isn't really "Unusual Notrump", LHO tells us "you learned it one way, we learned it another way."
Your next two words should have been "Director, please", both to educate your opponents and to protect yourself from damage.