Does the microwave destroy nutrients?

Have you ever heard that microwaving foods destroys many of the nutrients present in them? Now, I'm not talking about processed, packaged foods, but natural items like veggies and fruits. Is it safe to cook them with microwave radiation. Raw is always best, but often it's not practical.

Many commercial fruits and vegetables are already subject to irradiation anyway (to prevent bacterial infection and other nastiness), but in the process nutrients are destroyed. This, however, is not the same as microwaving, where foods absorb energy and heats itself up as a result.

Although I would never microwave certain product like plastic or PVC containers, microwaving many foods in glass or ceramic makes sense. Just make sure you follow directions if what you cook are pre-packaged meals. When it says "let sit for 2 minutes, then remove," the directions mean just that.