Hi, ive got a very annoying problem with the unity editors interface iteself, nothing project specific related. The Inspector tab goes blank after toggling a bool or putting a single unit into a variable or chaning anything at all in it, it stops doing it for 5-10 mins if i cloose/reopen the project, but its dam annoying to have to do this every 10 minutes as you can imagine.
This happened with unity 2.5 and 2.6, and its not specific to my system, as it happens on my laptop also.
I have this problem too, although it happens with a lot more than just the inspector tab, and it happens very randomly, most often there are labels which are dissapearing (I.e variable names, the labels on popup fields and such), but it can also be whole meshes which dissapear, although that can be something else, the solution is the same though, I need to restart Unity to get rid of it for 10 minutes (with the mesh problem I can reimport the asset to get it working too though).
This happened to us, too. We're making a networked game, and if you quit the game without disconnecting, the inspector would deselect after a single click or keypress.
Hitting the start button twice to start and stop the game fixes it for a while, as mentioned in oxl's forum thread.