Hey, I'm here, I'm here, damn it , I actually have a job, lol ! Hey MG, I'm glad you are trying it, great little app !!! :D Anyways, what happend there ??? :P Usualy that happens when you have the same edge shared by more then 2 polygons (faces). Subdividing algorithm does not like them ! It happens to noobs a lot, as it hapend to me too, not long ago, now I hardly ever get them... To get rid of them, just select those faces and delete the ("crown" thingies) and re-build your geometry. You can also undo everything or start from the scratch, just play with it and you will be making things in no time :D Search the Silo forum for tutorials, and there is couple of them on their website, good luck, buddy !!!! :D