Thanks for the information... in fact, I had done something of a similar nature.. I had used the hand held shower portion to play the water along the top edge of the tub, which is cast iron, and sure enough the water came out... I am hoping that its nothing more than defective caulking. I have removed all the caulking and recaulked the entire shower/tub area... while I was doing that, I also ended up having to cut out the support board that held the pipe for the shower head.. instead of a threaded 1/2 inch female fitting, they sweated a copper pipe with a threaded fitting on the end in the shower!!! then they put what looks like a tub spout on that which has a threaded fitting at the end of it, then they put a 1/2 nipple on it and THEN put the shower head. I ended up cutting out the piece whose ends I couldn't access, then cut the pipe riser and put on a new piece of pipe with a standard threaded female fitting, then put in the regular pipe... tomorrow is the acid test..the caulking should be dry enough to test ...keeping my fingers crossed.. a lot of work for nothing if this doesn't work!!!