It looks like I've done something stupid. I used wallboard joint compound to repair a hole in drywall. Everything went well in the application and sanding process. Now, a few days later, there are spider cracks in the compound.
Should I have used spackling instead? Do I have to remove all of the joint compound (sanding) and start all over?
If wallboard joint compound cracks this easily, what good is it? The wall is dimensionally stable.