I agree, something is different and I can't find out wha it is. I am going to take it out to the local Dewalt factory repair station an see wjat they say. I wonder is someone put the wrong Dust Chute/Spout on it, That to me is the only reason I can see that is stoping the blade from coming off. The is a protrusion that comes out of the side of the chute and that is what the blade hits. could be one for a different say the put in the wrong parts. Will let you know what I find out. I have 708 pounds of Laminate flooring sitting in my Garage that needs to get installed next week other wise my wife will be upset. $450+ and I can't use not a good excuse. I may go by Lowes or Home Depot and look at their display saw and see what they have. Thanks for you help. Guess I will watch football this weekend, ah gee. Saturdaqy Went by Lowes and looked at a Dw717 Type 1 the dust chute looks the same but does not have the molded lip at the top of the opening. The Type 2 is molded with a lkip that bends toward the blade on both sides, The 2 halves of the chute are mirror image of each other. Will take it in on Monday.