Moved into my current home about a year ago. After about a month I noticed a small amount of water on my kitchen floor. I looked up and found water dripping from my ceiling; the drywall was wet. After some investigation I found that it only leaked when after or during a shower. I found some places where the grout was loose or even missing between tiles. I removed and regrouted about a 3' by 2' section of tiles; all other grout lines seemed to be in good shape.. Well, that worked for about another month or so but the leak began again (or maybe was leaking all along. might have dried up from not using the shower or a month or two before regrouting). Anyway, I can see the plumbing of the tub from the rear as I cut a square inside the vanity in the bathroom that backs up to it. The plumbing seems fine and does not leak from what I can see. After running the shower for a while i can see water begin to drip off to the side of the tub in a location that I cannot access easily.. Could the grout be bad and just not noticable? Any suggestions would be great.