We live in a rental. The toilet was leaking when we arrived. Landlord paid for a plumber to do a simple repair, but before that, there was definitely water pooling underneath the tile (and seeping through the grout in some areas when you stepped on the tile. The correct thing to do, I suspect, is to re-do the tile and clean up the mess. However, our landlord will not agree to this and I don't have the time / funds to do the project right now. I'm wondering if there is a temporary way to get rid of the mold / mildew under the tiles. You can guess what I'm thinking: pour disinfectant all over the grout and tile and hope it seeps backwards and kills all the mold. I have enough sense, at least, to ask if there's a chance this may work (with the right product) and also whether there's a better temporary fix. Thank you!
2013-12-10 Edit: Thank you to those who provided advice. I thought I would update: I took no action and slowly (maybe a month or two), the smell went away.