I have had the disappearing cross hairs for a few weeks. After trial and error, of testing different solutions that did not work, I may have discovered a solution, it seems to have been working for a few days, problem free. I reset the profile to the default. After reset of the profile, the cross hairs so far have been visible every time. Hopefully this works. The only down side to reseting the profile is that I had to re-adjust my drafting settings, and modify my file paths all over again, as if I had just reinstalled the program.
Try turning off the view cube. Has your system been running slow on MS/PS chnages? Does changing to a 3D vpoint take a really long time even on a small model? I had these issues until I turned off the viewcube abd went back to using toolbars to change view. Just a thought. I am trying to narrow this issue down also.
Joe