That number is wrong. I have a 2003 Safari 25 SS - I don't have ready access to the trailer right now, but the sticker on the inside of the wardrobe door tells the actual empty weight. IIRC on my heavily optioned unit the empty weight is around 4,900 lbs, and the gross weight is 6,300, for a usefull load of 1,400 lbs. From this you should subtract the weight of LP gas (~60 lbs) and water (39 gal * 7 = 273) for a net of 1,067 lbs.
is an old site, but with more accurate numbers than you had seen.