a. When using stainless steel pots or other metal pots, will stirring with a metal fork scratch the pot? If it does, will the scratching release metal into the food?

Corning cautions that glass pots can break or explode when heated after scratching or chipping them.

The pots I currently own, pink in color, were a gift and I think purchased @ KMart. I love them, use them with care, and feel that they are the best way to go as I move into organic foods and a more healthy cooking program. I want to eliminate as much nickel and aluminium from my life as I can. Ergo, glass pots! Where are they?!

Besides the reminder that crockpots are ceramic and cook many things very well, here are my suggestions:
1- EBay still has Vision glass pots pretty often- register and buy you some!
2- Some of the outlet mall Corning stores still have some Visions ware- if you live near one, call, they will ship if you buy by credit card
3- Cast iron, especially old cast iron, releases only a food grade iron that is actually helpful for women and vegetarians. If you are willing to keep them up, which is season and then dry in your oven,they are great cooking pots and pans.
4- Enameled cast iron, such as Le Creuset, is heavy and pretty expensive, even at the outlet mall. The finish is about as inert as glass, and if you do eventuually craze it by overheating or chip it, that is friendly cast iron underneath, not some mystery metal such as used in the lighter weight graniteware pans (the speckled ones).
5- Laboratory glass or ceramic that can be used over direct flame is s finre option, if you can find it and afford it. No good for fast heating, but fine for simmering and stewing.
6- I have a Spanish red crockery pan with lid that holds about 2 quarts. It has to be soaked before use but is safe on direct heat on my gas range. I got it at GB Ratto, International Grocers in Oakland, Ca:
GB Ratto & Company, 821 Washington St., Oakland, CA 94067 Phone 510-832-6503, 800-325-3483.

-dont heat if empty
-dont add very cold food to a heating pan
-start over a medium heat, not blast high

Yep, as long as you follow the cautions above, but it will be slow! Vision is not too good at browning. How about drowning under the broiler or in a cast iron [an or a skillet?

Thank you

Corning isn't making Vision any more, they had a bad problem with the pots breaking when dropped a few inches, such as just from the dish drainer to the counter.

Check with your local corning-revere outlet to see if they have them. I was told this is the end of the entire 'vision' line. I have bought mine today at Great Mall (CA) outlet.