A regular glass dish - that is very cold when taken from the fridge, will crack if placed inside of a heated conventional gas or electric oven, due to the rapid change in temperatures - thermal shock. A regular glass dish that is very cold when taken from the fridge, may or may not crack if used inside of a microwave oven, since a microwave oven heats the food first, and not the dish itself. A pyrex dish - that is a cooking vessel of some kind - that is very cold when taken from the fridge might crack if placed inside a heated conventional oven, however if the oven was cold and then started the same dish will probably not have a problem. Usually it is best to let the dish become room temperature before placing it in the oven. A pyrex dish even cold may not have as much of a problem in a microwave oven, again since the microwave oven heats the food directly and not the dish. Corningware that was made from pyroceram (generally the older dishes) as well as the Visions line of Corningware cookware can withstand the sudden temperature changes of a cold fridge and an oven - whether the oven is a conventional or microwave oven. If you are unsure whether the dish is pyrex, stoneware (often used in many casseroles), Corningware pyroceram or Visions Corningware - then it is best to set the dish out until if becomes room temperature and to not preheat the conventional gas or electric oven. Often the bottom outside of the dish will indicate if it is oven or microwave oven safe. Since microwave ovens do not generally heat the dish inself, there is less danger of cracking with most cooking vessels.
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