I'm experiencing some spooky behavior from SW. We're running R2010, SP0, on Windows XP, V2003 SP2, NVIDIA Quatro FX 1500. When I open a model file, the "surfaces" filter is on. I can turn on any other filter and everything works fine, but if I try to turn ALL filters OFF, the "surfaces" filter stays on. Is this normal, or is there a setting I need to change? Thanx.