I feel for you. I recently bought a '95 850 sedan and the driver's door was almost completly seperated from the base support. The passenger side had started bubbling up too. I had to get a replacement DS from a local recycling yard for $100. I was informed by a Volvo parts salesman I know & trust that with '93, Volvo used a environmently friendly glue that just doesn't hold up esp in areas of constant heat. I guess it doesn't get too hot in Sweeden. But, there is a ray of sunshine. My daughter's '94 850 is perfect and so far shows no signs of this problem, maybe because is spent the first half of its life in Canada and until 2 years ago, in Maryland. We're in Florida, so we're holding out breath. Oh, window tinting and windshield sun screen is a big plus too.

Good luck