Cannot use 'in' operator to search for 'using' in false with JScrollpane and Jquery 1.8.1

Cannot use 'in' operator to search for 'using' in false with JScrollpane and Jquery 1.8.1

Hi.

I used jquery 1.6.1 with plugin JSrollpane, and then I pluged the newest 1.8.1 version of jquery.
And it gives an error: Cannot use 'in' operator to search for 'using' in false

Maybe somebody knows, what is this mean? And what should i do?

Thanks in advance