My client's application is using both Prototype and Jquery. If you look at the attached image, everything works fine except for the "remove" button. When you click on it, the field is not removed...you just get a pound sign (#) appended to the URL.
The "remove" link is supposed to use the Prototype library but it seems like it doesn't so I believe that's why the error happens. If only the Prototype library is used, then the remove link works fine.
I can provide the link to show you the code through private message if you'd like to see it.