Sure...
After finishing testing a new coaster I designed, (I've tried this in both the designer and in game scenario), I clicked the save track design button. It is fine until that point, when you would usually see the save screen that lists all current coasters by name. Now, it does nothing, as if the button were disabled. I know it is not disabled because not only it is not greyed out (indicating unavailability), but it allows me to select scenery to save with the design. Once I do that, the save screen never appears, and I don't get the "click" sound that indicates it was saved.
Try finding the directory your tracks are stored in, click on "properties" and if read only is checked, uncheck it.
If that doesn't do it I have no idea what's going on.