I had a battle to the death over my tweezers at LAX in May! This was a full 7 months after the government said that tweezers are "permitted items." (I won eventually, but it took about 30 minutes and consultations with various levels of supervisors.) And let's not forget that poor woman at JFK (Delta's Terminal 3) who was forced to taste her own breast milk more than a month after the TSA said that passengers do NOT have to drink from carry-on liquids.
Communication of rule changes leaves something to be desired!
Bruce