Happens all the time on those old stoppers.
http://www.bing.com/images/search?q...0A1F9AEE5D9B46E36C8E1752A752&selectedIndex=47
Do you have any access behind the wall or under the tub?
http://www.bing.com/images/search?q...0A1F9AEE5D9B46E36C8E1752A752&selectedIndex=47
Do you have any access behind the wall or under the tub?