Painted dishes that are sold for food consumption are supposed to be sealed against any kind of paint leakage. Even disposable plates(paper plates, plastic, styrofoam) must have decorations that don't bleed in to the food. I used to make wedding cakes for bakeries (and taught it, including the food safety stuff) and you'd be horrified at what bakers and home bakers would put under a wedding cake or even into it. Did you know that flowers are never supposed to be pushed into a wedding cake? Martha Stewart started a dangerous trend! She even had a wedding cake in one of her books with fresh delphinium pushed into the cake.....delphinium is poisonous.
So anything that is sold in a store is usually tested and if it doesn't past standards, can't be sold but some do get by. To test it, put it through the dishwasher and see if anything comes off. If it does..take it back. Otherwise, it should be okay.
But I still have my mother's Pyrex dishes and they are older than I am and I love them. So I love Pyrex and if you do too, then use it. Cleans well, cooks evenly and lasts forever!
Jenny