Thanks all. Sorry it's taken so long to respond. I was doing some experimenting the last few days after coming across an old thread on another site. (See last two posts in the link below.) Kirkhall seems to have hit upon the issue; my old setup had the diverter in the tub spout, with the shower hose screwed into the spout, while this doesn't. So, now it looks like the water gets "backed up" after we shower unless we manually turn the diverter to the spout. As a result, if someone then goes to take a bath (at least the same day--I have no idea if it would be different if we waited 12 or 24 or 48 hours between a shower and a bath) the water continues to drip out the tub spout for quite awhile. Not a bit deal except that it's a rather annoying sound during a supposedly relaxing bath! So I guess we just have to be conscientious about switching the diverter toward the toward the tub after each shower. Hopefully the problem is solved and the last two days haven't been flukes! Dapoppa, don't worry; I had no intention of doing any major fiddling on my own unless the solution was easy and obvious. However, I have learned the hard way that unless a contractor has encountered the exact situation in the past, he--like pros in many professions--may start experimenting in a way that's likely to cause more problems. I like being an educated consumer. Here is a link that might be useful: Dripping Bathtub Discussion

Initially, my designer recommended placing the free-standing tub filler off-center, in the corner, at the end of the tub (where my feet go) and it was plumbed that way. Then the designer changed her mind, and decided that the faucets should be centered at the end -- so I paid for plumber and tile setter to make the change. I considered having the faucets placed behind the tub, between the back wall and the tub, which would make it easier to add water when I'm in the tub, but then I would need to reach over the tub to fill it before entering. And designer said it's best to "show off" the exposed pipes on the filler. I just realized that there are black "spots" on my tub -- paw prints from the 10-year old cat I adopted this summer -- luckily, her prints wash off easily.

Is it gushing out of the tub faucet? Can you not turn the main water off because you need to keep at least a trickle moving through your lines? If so, could you shut the main MOSTLY off but let a trickle through such that only a little is coming out of the tub faucet?

This is not a warranty issue. This is very likely an easy DIY fix or a plumber’s favorite problem. The weight has either fallen off the hose or it is too low. Hose weights often use a tool-less compression fitting and if they hit stuff under the sink (including disposal or drain pipes) they can lose that compression. They will often come loose and either fall off or slide down. The weights that use tools come loose less often but it still happens. There are a bunch of videos on Youtube that will walk you through repair. Just make sure weight is in the right position for your setup (ignore the marked hose position). Good luck