From Simple Kitchen Makeovers, Gail asks:

"We need to remove a metal kitchen cabinet to allow us to get a new refrigerator which is taller than the space allows. We have unscrewed it from the wall and can't seem to loosen it from the wall. The overhead soffit appeares to be solid wood instead of drywall. Do you suppose it was standard practice to glue it to the soffit? We don't see any other nails or screws."