First off, I have been using Draftsight for a couple months now, and so far have been very impressed.  That said, I have one small issue I hope someone can help me out with.  Every now and then, I get random "blips" or small points on my screen.  They aren't selectable so I can't delete them, and stay just a point now matter how much I zoom in on them.  Once they appear (for whatever reason; I haven't seemed to be able to see any pattern as to when they appear), they don't go away.  They appear in model space and also in any viewports I create on layouts.  They also effect zooming.  For example, if one of the points is some distance from my geometry, and I hit zoom-fit, the "fit" includes that point, making the geometry small and off to the side (hope that makes sense).  Looking for ideas.  Thanx, Jeff