While reinstalling the toilet after getting new Kardean flooring, a gasket broke and water flooded the bathroom. Water is still bubbling up through the seams. Installer says no harm done, but I am thinking the floor should be replaced. What do you think?

What kind of subfloor is present under the Kardean flooring? If that is wood as well, you will probably have a problem not long down the road. If you have a concrete slab, you may be OK.

I think you should run a dehumidifier in the bathroom and then see how the floor reacts over the next couple of weeks. Be sure to take pictures and you may want to consult your insurance company to see what they think here...may be worth it depending on the size of the bathroom and the size of the deductible...;)

Mark