.hover() not working for Chrome

.hover() not working for Chrome

I have the following code:
  1.             scrollhandleEl.hover(
  2.                       function () {                   
  3.                         isMouseOver = true;
  4.                       },
  5.                       function () {
  6.                         isMouseOver = false;
  7.                       }
  8.                     );
...which works fine in Firefox. For some reason it make Chrome stumble and the whole context falls down.
My var scrollHandleEl can be traced as a dom object.  var isMouseOver is defined as false further up my code.
Everything looks right, in fact it works in Firefox, but not Chrome.  Does anyone know why?