In Data's Day, there is this stock footage of the test cylinder beaming:
http://tng.trekcore.com/gallery/albu...atasday274.jpg This is a continuity error as this is obviously the season 3 transporter and not the updated season 4 transporter like in this shot:
http://tng.trekcore.com/gallery/albu...atasday258.jpg Would be nice, if they could fix the set.