I didn't have a crack that actually leaked, but it seemed that the floor was more flexible than I liked.
I reinforced it with
fiberglass matting and resin and painted over it..
I'm curious about how the pan is configured, since there seems to be no obvious seam on mine (like a few inches above the floor). Is this a "factory replacement part" or is it a aftermarket pan that fits nicely in front of the toilet?