superfish animate not working

superfish animate not working

I am using superfish, and it used to work, but no longer fully works. The delay works, so I know it's loading jquery and the plugin correctly, but it's not animating opacity or height/width. Why would it only partially be working? I'm using superfish version 1.4.8 and jquery version 1.4.2. Is there an incompatibility between these two versions?